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Hey everyone since the update in GTA this newest heist has been the most profitable and easiest way to make money. So I wanted to create a guide to help others master this heist, and to help those who are struggling with it.
Note: This guide is for new players, first timers, and anyone who is struggling to complete this heist. Please use this as reference to deepen your understanding of the heist. If you have a better strat, more power to you. This however is my strat, criticism is welcome.
So to begin, you will have to buy the Kosatka (submarine), which is located on warstock for 2.2mil. It also has upgrades you can buy but the most noteworthy upgrade is definitely the Sparrow upgrade (1.8mil) this upgrade will make traveling back and forth much easier since your sub is located in the sea.
Noteworthy things about sub:

• If you hover above your sub with a sparrow you can instantly enter it.
• You can get free snacks at the cafeteria
• You can fast travel; if you never completed the heist its 10k, after completion its 2k
• Your toreador vehicle can enter through the bottom
• You can call dingy if you can not afford the sparrow

After you get the sub you’ll be introduced to characters and will have to go to LSIA, where you will travel to Cayo Perico, after you arrive everything henceforth is pretty straightforward. After you escape the party you will have to enter the main island through the checkpoint ( Google Boom Gate), PLEASE DO NOT SWIM AROUND THE ISLAND. You will waste so much time doing so, just run through the gated door next to the checkpoint and avoid entering enemy cones, watch for vehicles and watchtower cones. The biggest things to scope out are the infiltration points and exfil points; the airport strip is already marked, the biggest point to scope out after you hack the cameras is the drainage tunnel. This will require swimming, the drainage tunnel is located on the coast of El Rubio’s compound you can dive and find it, Pavel will give you a vocal cue when you find it. When you are looking through cameras after hacking make sure to cycle through every camera, turning to find secondary points, stop until you get back to the Panther Cage. Don’t bother scoping anything else like bolt cutter’s or grappling hooks, because you will not need them. I added a map of Cayo Perico to show where everything is, please note that there are many ways to do this heist this is just my way of doing so. After you found the drainage tunnel and finished your objective, get caught and make your way to the airport strip to leave. Also note there are different Primary targets the first time will always be the files the second will vary, look in the tips for scoping out to see the rankings.
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Credit to Sportskeeda
Tips for Scoping out

• On your second time doing the heist you will start at the air strip. There are 2 dirt bikes located at the strip one by the entrance to the strip and one by the solar panels next to the power station. You can take the bikes and drive up and over the checkpoint to get to the communications tower faster. At the checkpoint to the left there's a little stone wall in front of the guards tower. You can drive the bike up the ledge and get over it, for a quicker way you can also drive the bike up the ledge a little bit in front of the wall to also get over.
• If you solo, scope out any important secondary point. There's a secondary point in the airstrip hangar, at the entrance of the hangar look right to see the box you can climb, use this to get to the second floor to get the secondary point. (To clarify check the targets spawns and only mark coke and weed; do not mark weed at the strip and north dock only coke, mark weed at the main dock)
• When you are heading to the communications tower to hack, pay attention to the guard, if there is a guard, the box is located up the tower, if there is no guard it's on ground level.
• You can kill yourself or get caught to go back to the airstrip.
• You can also poison the guards water supply to weaken them but unless you're going aggressive don’t bother.
• There are boats out in water you can steal but I would only do this to scope out the drainage tunnel the first time.
• You only need to scope infiltration points and exfils points once, secondary targets and tools must be scoped out every time.
• Secondary targets and tools are RNG based so if you're looking for tool and it’s not there it’s because of RNG
• Secondary Targets Rank: Gold>Cocaine>Paintings>Weed>Cash
• These also will fill your bag different
• Gold=66% Cocaine=50% Paintings=50% Weed=37.5% Cash=25%
• The price for secondary targets are RNG based but Gold, cocaine, and Paintings have the most value
• Secondary Targets Values are RNG based.
• Gold=332k, Cocaine=220k, Paintings=189k, Weed=147k, Cash=80k-90kCredit goes to u/FMT_WL1
• Primary Targets Ranked: Panther Statue 1.9M>Pink Diamond 1.4M> Bearer Bonds 1.1M> Ruby necklace 1M> Tequila 900k

Preps
In order to start the heist you must do preps, for this heist you can do however many you want but for this guide you will only need to do 5. Keep your sub in Los Santos until the fifth prep mission, if you decide to do the longfin prep you can keep your sub at Los Santos.
Prep 1/ The Cutting Torch:
This prep mission is pretty straightforward, head to the construction site and land close enough. Before heading in, try to locate the yellow hard hat and put it on, this will make the enemy non-hostile, which makes for an easy mission. Your job is to locate the torch in a tool box. You can find it by looking in the box, it's a blue torch, search the box and head back to your sub. Also when searching for the box try to avoid staying in the enemy cones for too long and bumping into workers because this will make the enemies hostile if you do these.
Prep 2/ Safe Code or Plasma Cutter
There are two missions. The mission will vary on your primary, if you have the bearer bonds it’s the safe code, anything else it’s the Plasma Torch.
Safe Code Mission: Head to the casino at the entrance, after entering turn left and enter the elevator (if you have a penthouse you can go up without entering the parking garage). You will have to find a car in the parking garage. It's a yellow cheap car, it never changes. After finding it you will get the card which will allow you to head up into the penthouses, after getting up there search for two guards and head shot with a suppressed weapon. If done right you will calmly walk into the apartment, you can then search the penthouse for the target, he will never change. It's a guy with a cowboy hat, kill him and leave the penthouse, you will have to fight your way out. If you slam into the entrance of the penthouse you will have to fight your way in. After getting the code get back to your sub.
Plasma Cutter Mission: This is pretty straightforward, for ease take your oppressor instead of your Sparrow for higher mobility. You will have to head to the office to get the plasma cutter, but it’s not there. Pavel will instruct you to find the board and take a picture of it, the board is easy to find. Afterwards he will locate them and ping it on your map, they usually always spawn near Vinewood hills or the beach. Take them out with your oppressor missiles and fly over the bag and leave cause they will spawn two cars to shoot you.
Prep 3/ Fingerprint Cloner: This mission is simple, you will have to head to a location on your map, outside are two cameras, ignore them and walk into the garage, after entering take cover behind the box forward and blind shot everyone with your shotgun. After the enemies are dead hack the laptop in the back and head to the archives. Outside the archives are cameras, shoot them and go inside. Pavel will tell you that you're looking for a small card, it always spawns in the back in the desk square, grab it and head back.
Prep 4/ Weapon Load out: Always buy the suppressors, as for which load out I suggest the Conspirator due to the sticky bombs (there is a bug where you will get suppressors without buying them, just in case purchase it to be safe). There are two possible missions you can be given. One is in Los Santos in an office, for the other you will have to follow a Valkyrie up North.
Weapons Possible Mission 1: Pavel will send you to an office in Los Santos you can either go through the ground entrance or the roof, I suggest the roof entrance but no matter what you will have to fight inside. Once inside clear the office and head to the back to find the gun safe, it’s always located left of the desk on the wall, hack the laptop on the desk and open the safe. Grab the weapons and leave. If you enter on the roof you can fly back but two chopper’s will spawn, shoot their gunman on the sides and hellies will be useless. Another suggestion is to leave immediately, and snack up to restore health. On ground level the hellies will still spawn again shoot the gunman and head back to the sub.
Weapons Possible Mission 2: You will have to head to Elysian Island to find the Valkyrie you do not need to stay close to it. You can predict it’s direction and head North to clear the camp on foot, also avoid destroying the Avenger and the Valkyrie. Do not destroy the Valkyrie until it becomes a target on your mini map or you will fail the prep. After clearing the camp head into the Avenger and kill the enemies, afterwards parachute out and leave before more Merrywheather show up.
Prep 5/ Kosatka: ( You can also do the Longfin, but I prefer Kosatka as an approach vehicle.)
This is a simple mission, after starting it head into your sub driver seat and fast travel to the nearest location near the ping. After you arrive dive your sub over to the location, once you get near get on your periscope and missile the boats and the helli. You can sink your sub and engage auto-pilot under water giving you better access to the enemies sub. Try to avoid beaching your sub on shallow water and put it in the middle of the yellow circle. Leave the driver seat and exit your sub, dive into the water and look for the other sub with a yellow marker on top. After entering the enemies sub you must locate the jammer. You have two paths, one on the right, this is usually where it spawns, take the ladder down and watch your corners cause enemies are brutal in this mission. After entering the engine room look for a black box with a blue screen at the bottom of the stairs if it's not there head back the way you came. Take the left path and make your way to the control room WATCH THOSE CORNERS. If it's not there head to the back of the control room and take the stairs down, follow the path it will lead you into the torpedo room, that another spawn. Leave and head back to your sub.
Prep 5/ Longfin
This mission is located in Los Santos basically you can take a phantom (Semi-truck) to the police station to pick up a boat of which you can use as an approach for the heist. This mission is simple: you basically go and pick up a phantom, afterwards you drive to impound to pick up the longfin. You will be met with enemies. The one I did was the cop impound, you can enter with your phantom and drive out. It's best to clear the area, and let the cops kill you for an easier delivery (you can't call Lester). You can use your own Phantom wedge to clear vehicles out of the way.
(during the heist you can use this get loot before you enter the drainage tunnel , this can be quicker way if your loot is out the way)
This includes the scope out and the preps
This includes the scope out and the preps
Tips For Preps

• The biggest tip is the Sparrow, this will make prepping a joke, the only time you won’t need it is during the plasma cutter and Kosatka missions, but that's due to mobility.
• You can see the cutting torch it’s blue
• You can blow up the Valkyrie and end the mission to get the office mission to save time, I highly suggest this ( I do this mostly because you have to follow the helli up North and wait for it to land.)
• The preps are the same, they never change
• Save the Kosatka heist for last so you can do all 4 preps in Los Santos

The Heist
Time to Start the Heist. Go to screen and tab to Finale and shift over to continue to start the mission. Once you get to the selection process pick your options. It should be Kosatka or Longfin, Drainage, Drainage, Main docks or Kotsatka, and Day Time (there's very little difference between day or night). If you're playing with others you must hurry through the selection screen because if you take too long the cuts will reset due to a bug.
Squad Run
When you begin the mission you will have to make your way to the drainage tunnel, if you chose the Kosatka you will have to swim to the tunnel, but if you chose the Longfin you will have to drive the boat to the tunnel. Once you arrive you will have to cut the bars at the gate, a suggestion to do this is to go in a circle three times and cut whatever remains. Afterwards swim through the tunnel and enter the compound.
Compound
Once you enter the compound you will have two directions to go, the left or the right. My way is to go to the left, up the stairs is a guard next to the storage staring out at the water, head shot him and make your way to the courtyard. If you followed my instructions the two guards at the pool will be to your left. In the courtyard there should be a guard coming, wait for him to stop and head shot him. After that, ready your shot at the two guards at the pool, choose your target. Since you're in a squad, ready your shot, as a suggestion one person can count down from three to one to shoot at the same time to eliminate any mistakes ( these two guards usually drop the gate keys). The next is to eliminate the juggernaut, the way to identify him is by his red cone and red skull icon. He can be killed by a single headshot, if you and your squad were quick with the guards at the pool he should be arriving, take him out. In front of the pool there are two separate guards, one will be in front of the office building to identify him, the camera is facing the pool, if you time it correctly he will be to the right of the camera making for an easy elimination. The other guard is North East of the front of the pool, or to the right of the guard you just killed. You can eliminate him if you want too, the reason I do so is because me and my mates can all access the storages without worry. Next are three guards at the office, to identify them they will have red cones. One of the guards will be moving North towards the main gate and then will move South towards the pool. You have two options, one is to wait for him to head North and take him out, or you can head shot him when he’s coming South. To achieve this there are stairs directly in front of the pool, if you take the stairs up to the right you now have enough elevation to see the guards head ( this is tricky to explain which is why I will also have a video example for visual clarification.) After taking the guard out you can head up the stairs into the office area, once up the stairs head to the right, for clarification the pool will be to the left and main gate to your right. Head down the corridor if you have done this correctly the guards back will be facing you, take him out. To your left are stairs that leads to the office, take them up, at this point the guard at the top will start to move. You have two options, one you can wait behind a corner and hit the guard or if you are quick enough the guard will stop for a brief moment, giving a chance for an easy headshot. At this point you can enter the office, where you can grab the second keycard, the first keycard is dropped by any guard you have killed ( it usually drops on the first kill, but this is RNG based). In the office there are three things you can do, one is you can hack the elevator which leads to the basement, ignore this hack. The other things are either a painting that can randomly spawn in the office, and a safe on the right wall in the back of the office. Open the safe to get anywhere between 50k to 100k, THIS DOES NOT TAKE SPACE. When you have everything, start to loot up and fill your bag by going to the storages located around the compound, to open the storages you will need the two keycards and two people. You and your squad mates will have to swipe your card at the same time to open the door, another suggestion is to use the three to one countdown to sync swipes. The South Storage will have a guard moving, the guard is located to the left of the two guards you killed at the pool, take him out and watch for the camera. After you are done, please make sure to save space for the basement storage, make your way to the basement gates, they are located beneath the office building to the left and right, it does not matter which gate you choose. Once you are in the basement you will be presented with a hack, it may look daunting but in fact it is rather simple, I suggest matching the top first and making your way down. Afterwards loot up and grab the Primary Target, it is really straightforward to do so. At this time Pavel will tell the players that more guards have arrived, if you have followed thus far, you do not have to worry. Exit the basement, and head North to the main gate there should two guards, one will be moving the other stationary. You can take the stationary guard, you can also take the guard moving but if you and your squad can make it to the gate without doing so, go ahead. The host will be prompted to select the escape route, select it and a cutscene will begin. After you will be located outside the compound.
Kill in this order
Outside The Compound
You and your squad will be outside, if you are satisfied with your loot head left to the coast, you can jump off the cliff into the water. Once in the water you can swim off the island ,just keep heading straight and eventually you will have escaped. You can also try to steal a boat; note that some have claimed that boats may not spawn but if you manage to grab a boat this can make getting to and from much quicker. If you are missing loot head forward and take the guard next to the bike out, one person will have to head left toward a guard near a helli take him out and plant four stickies on the chopper. At the same time the other members will turn right towards the checkpoint, there should be three guards two together and one separate, and a camera behind the two guards. Take the one separate out, then the two guards, and the camera. Around the checkpoint are three bikes plus the bike with the very first guard killed. One of the bikes is hidden to the left of the checkpoint booth the other is directly in front. Start making your way towards the main docks, turn right into the jungle the moment you leave the stopping checkpoint. Pay attention to the guard tower to your right and avoid his cone, at this time Pavel will tell the squad that El Rubio’s helli is on the move, activate the stickies and he will retreat away from the island. Once you are close enough to the docks go on foot, your objective is to loot and take the boat off the island. There are two secondary loot locations, one is a warehouse with a guard and camera outside, take them out and loot. The other is located to the right with two separate guards, please refer to Sportskeeda map to see the location. Take them out and loot. Afterwards there are 3-4 guards you have to take out at the docks, to leave without alerting the guard. Two guards standing next to the boat, and one or two stationary guards looking out at the water. After clearing the guards, grab the boat and escape Cayo Perico. Congrats you have now completed the heist.
Note: You can approach the compound in any way you choose, my way is a bit complicated but with practice you can clear the compound at the same time as other routes. Feel free to adjust the route in anyway, my route is just a reference to get an idea as to how to approach the compound.
Note: I do it the same exact way when I solo, but since I’m solo I can skip guards and head to my objective. For the Solo run I go for cocaine, you NOT have to do this. I do this to maximize my profit, and since I am competent in my abilities I can clear the mission without many mistakes.
Solo Run
The strat is the same except it will be harder to take out the two guards by the pool, the major difference is you can not open the storage's to get gold or loot, you might be lucky to get painting in the office but that's RNG. A good tip when taking on double guards is to find a good angle, after killing one the other will flinch, he will prop his head up giving you the shot. You can scope the rest of island to find the most profitable loot which is cocaine, if there is none then get weed and cash (by scoping out I’m referring to checking the spawns for coke, if there is none at North docks and the Air Strip I ignore them, I do not mark every item only Coke and any profitable items at Main Docks). After leaving the compound there will be a guard in front of you next to a bike, kill him. Turn left and head to the next guy next to a helli, kill him and plant four stickies on the heli, do not activate them yet. Go back the way you came, there will be three guards at a checkpoint two together, one standing away. Kill the one standing away and then prepare to kill the two guards, after their dead shoot the camera and jump over the stop rail. You will have to be quick because a car will drive towards the checkpoint so make sure to do all that quickly. You have two options: you can swim off the island and finish the heist, or you can head to Main Docks to fill your bag. If you chose the latter run North East into the jungle towards the guards tower, but far enough away so he can’t see you. On your way to Main Dock Pave El Rubio helli will show up on the map, wait for Pavels vocal cue when he tells you that Rubio is in his helli, and then activate your stickies, boom Rubio will retreat. Now you can make it to your objective in peace. You can loot at the Marijuana fields but you may have to take out three guard towers and a single camera, as well as two guards near the fields. I’ll leave this to your gut if you think you can make it to the warehouse without messing up please do so. If you want to head to North Dock and the Airstrip you either can swim there which will eat a lot of time or you can take the boat at the docks to get there faster. Trade off is that if you swim it will take up time, but if you take the boat you will have to clear out guards to safely remove the boat from the dock. If you are satisfied with anything you get then just clear the area with loot and swim or steal the boat. This is for the Airstrip if you do not plan on going here IGNORE this. The Airstrip is an easy place to navigate since a lot of the guards are far from each other so you can clear the airstrip easily. There are two loot spawns one at the hangar with one guard, and a warehouse with two separate guards. There's guard outside the hangar kill him, and go inside, if your loot is on the second floor, look for a forklift and pick up a box lift and it up then press the box against the back of the hangar below a blue tarp you can then climb the lift and the box to get access to the loot. The other airstrip loot spawn is an easy place to clear, one guard will be moving you can head shot him from the hangar, at the warehouse there’s a camera shoot it and inside the warehouse is a guard questioning his career choice, kill him. If you need to head to North Dock head there by bike or by foot, you can loot without killing any guard. After you're done just swim off the Island, or take the boat. Congrats, you have just completed the heist solo.
Note: I will be adding a second strat to clear the compound, the reason for this is because a Redditor provided the strat. I do not mind adding his strat, but I must remind everyone that you can tackle the heist in any way you feel comfortable with.
I missed that gate keys, so I killed more than I should have.
Solo Run Second Strat:
Essentially, it is the same as the other one, except for going left you go right. Your first target are the two guards at the pool. They should be to the right of you, find a good angle and head shot the first one, wait for the second guard to finish flinching and kill him. The juggernaut should be making his way towards you, wait for him to exit the camera’s view and kill him. If the gate key drops pick it up and kill the guard in front of the pool he should be past the camera. Take out the camera and wait for the moving red cone guard to turn his direction North, once he turns around go up the stairs and kill him. Move towards the second red cone guard his back should be facing you, hit him and ascend the stairs. The last guard on top should be moving. You can either wait behind the corner and hit him or speed around the corner to head shot him, it’s up to you. Loot the office safe and make your way to the basement. Finally, use the gate keys to open the basement, hack and grab the primary target. Afterwards head up towards the main gate, a new guard will spawn, you can wait for the moving guard to move out of range, and kill the stationary guard. From there you can run to the gate and exit the compound.
I had brain fart at the hacking lmao
Heist Tips

• You can swim off the island from any direction
• You can steal boats for faster escape but that's up you
• You can sticky El Rubio’s helli for to get him to retreat
• In the compound you can jump ledges after clearing the enemies
• For double guards, get a good angle after you head shot one guy the other will flinch, you can get the shot slightly after, or you can risk shooting him until he’s dead.
• Guards do not react to dead bodies, in day time their visibility is the same as night, an Isolated guard can’t alert if everyone is dead. You can run, guards will only react if you're close, if you miss a shot and it gets near a guard or makes noise this will alert.
• You can jump into the ocean to die quickly if you alert inside the compound
• If you find a key you can open the desk to get a golden gun
• If your underwater and a patrol boats cone is on you, they can’t see you
• Cones can be obstructed by objects
• ? Civilians may be able to alert guard?
• Solo is more profitable than playing with friends due to not sharing a cut
• If you don’t have to kill don’t, less interaction is good
• Being stealthy is the best way, if you alert restart
• You can aim in and hold the sprint button to walk faster
• To activate hard mode, you have to start the heist when it becomes available
• Try to avoid killing guards near the camera cones, the reason being is because this can alert the guards if the camera sees the dead body. Ironically, guards do not alert they seem one.

Game Over>
That's it ladies and gentleman, I hope this guide has helped anyone. I’m aware I’ve definitely went too in depth in this guide but I enjoy making it, Happy Grinding -Leaus

Where to begin with.. Ok, so, I started playing GTA again almost 2 weeks ago. I classify myself as an old school gta roamer who mostly does missions and heists...and has never been into race and stunts stuffs. Most of the time I am comfortable playing contact missions and heists with random people, and from time to time I would find someone has similar play style as mine and we would add each other as friend and do more missions together in the future.
Shortly after I started playing GTAO again after an almost 2-year break, I met this guy called Xhak-571 in a Gerald's Last Play. He was level 20, and I was around 250. Near the end of the mission he asked if anyone wanted to do a heist, of course I agreed immediately (he was new but certainly he knew what he was doing, judging from the way he played); and then we went through the entire Doomsday Series together. And Diamond Casino Heists after that, all 3 approaches.
I must say I helped him a lot, I'd always set my payout to 15% because it's not like I need the money, and he would definitely want more than I do, and so we kept playing to the point he has enough in-game cash to set up his own businesses including Bunker, Coke and Vehicle Cargo.
I also told him about snacks and body armors early on to get through tougher sections of the heists.
I sent him a fingerprint cheat sheet for hacking the padlocks in Casino Vault.
I taught him how to suspend GTA to get his solo public lobby.
I help him with his selling missions.
I gave him a helicopter lift whenever he needed to travel across the map (his Bunker is in Paleto Bay).
He's clearly into the game, that eventually he asked 2 other real life friends of his to buy the game and all play together. And we were in such good term with each other (by online gaming standard): always greeting, always laughing when funny stuffs happened, saying thanks when helped, and saying goodnight before logging off. All was good, until today.
After jumping into the game in the afternoon, I got auto invited into his heist finale. I was surprised, as the day before he was asking if he could do the finale with only two of his friends, so they can get more GTA$, and I happily accepted and left the launch screen. So I asked 'Did you invited me?', and after half a minute I saw the following messages in the image, from him and his friend. They are Italian-speakers and know that I don't understand any of this. Right before I could type anything, I was kicked out of the launch screen. I went to try to message them on socialclub, and guess what, I was blocked, by him, and every single one of his friends. I was super confused and thought it was an issue with R* servers, so I tried instagram, since Xhak-571 asked for my instagram a few days ago. He was online, and I messaged him what was going on, then he instantly blocked me again as his account became 'does not exist' right after I sent the text.
It's now clear that they all blocked me for some reason, but I'll never know why for sure.
I do however have one theory, it's that one of them checked my instagram, saw my pictures and found out I am Asian, and MAYBE they are some racist dicks and don't want anything to do with me anymore.
Now, I really thought it was far fetched, but my best friend (who is Italian) told me it's actually the likeliest explanation.
I was shocked, but now am now pissed, and deeply sad, as the moment I thought I found some people to play gta with, this kind of thing happens.
If you reached this far in the post, thank you for listening to my rant.
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https://preview.redd.it/buk93kibfdy41.jpg?width=640&format=pjpg&auto=webp&s=3a896a0b500eb5d27d6fcdfe76f88b7ddd59fa64

Hello everybody!

The new Casino Heist has been out for over 2 weeks now and there is probably already plenty of guides about it on YT, but I've wanted to make my own guide for a while now and finally think that I have enough experience to make one. I have played the Casino Heist about 30 times now (lost count at 10) and played all the 3 different approaches with a friend, so anything I say about the finale in this guide will be doable with just 2 guys, unless I specifically say so.
Keep in mind this is not a completely flawless guide, I will keep improving and editing it whenever I learn something new. I hope this guide can help you fly through the Preps and have no problems doing the Finale.
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1: The Basics
2: Vault contents
3: Approaches
4: Crew
5: General Prep Work
6: Approach specific prep

1. Silent approach
2. Big Con approach
3. Aggressive approach

7: Silent Finale
8: Big Con Finale
9: Aggressive Finale
10: Tips and tricks
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1: The Basics

• First of all, do the Preps in a solo public lobby. Theres no reason not to do them in a solo public lobby since others can only affect your experience in a bad way, unlike selling MC stock where you will get a bonus for every player in the lobby. (Guide for making solo public lobbies here)
• Of course you can do the prep missions with a friend, that way you can avoid having to go to a certain place twice in some prep missions, but it's not neccesary. If you and a friend both do your prep missions simultaneously, you will be able to do 2 Finales in 2 hours if you are experienced in doing the missions. If you don't have any friends to do the preps with, don't worry, they're all doable completely alone and shouldn't be a problem to a decent player.
• Now for Arcade locations. Of course I have to talk about Pixel Pete's in Paleto Bay. If you plan on doing the Casino Heist multiple times for a good income of large amounts of money, invest the cash from your first couple of runs from Paleto Bay into a proper arcade. I own the Videogeddon arcade in La mesa (~1,8 million), which is the cheapest in LS, but imo the 8-bit arcade (~2,6 million) is the best since its basically on the same road as the Casino and its garage is way more accesible than the La Mesa one since over there you have to drive around to the back to get into the Garage (Always enter your arcade through the garage entrance, it saves a lot of time compared to going through the front door, into the management office and through the secret tunnel) Either way they are both viable choices, but you should forget about the other ones in LS.
• Vehicle choice. Obviously the Oppressor Mk II is your best friend for most of the prep missions, but there are plenty other viable alternatives. The Buzzard can be spawned in directly in front of you via CEO vehicles (if you own one it's free, otherwise it costs 25k per spawn) The issue with the Buzzard is its armor. After taking a couple shots, and trust me, you will, your Buzzard will start to smoke and will then stop working within ~5 minutes. The Akula is another very viable choice, especially when looking at the fact that you will have to lose the cops a lot (the memes are true). It also has fast firing homing rockets (don't use the rocket barrage, it's useless for grinding purposes) which will also help (it has infinite (?) rockets so running out of them won't be an issue, unlike the Oppressor, which only has 20) The Hydra is another hidden gem for the prep missions, if you can fly it well that is. Keep in mind that when using bulky vehicles like Helicopters or jets, the La Mesa arcade will be even worse since you have to land on the road and walk around the back of the arcade, whilst with the oppressor you can just fly straight into the back alley.
• Hard finales. After doing a certain approach, that approach will be locked for the next heist. After doing another heist with a different approach, the approach first used will become available again with a red skull signalizing it will be on hard. Choose your 2 favourite approaches (information about the approaches below) and do them back to back, as playing the heist on hard will of course result in the loot being worth more. Don't worry about the heist being to difficult on hard, the only differences for the 2 sneaky approaches is the amount of fingerprints during hacks and for the loud approach the improved armor will be more than enough to make the heisdt a cakewalk.
• I recommend purchasing the keypad at the prep board and training your fingerprint hacking skills on there. Trust me, you'll want to be fast when it comes to hacking the keypads. I get the hacks done in about 15 seconds and that is usually fast enough to get all the loot I want.

2: Vault contents

Alright, now for the interesting part, the vault contents. You probably know by now that Cash is the worst option. The best option in terms of money is Gold, while artwork takes significantly less time to loot. If you plan on doing the heist as a 2-man team, aim for artwork, if you are more than 2, go for gold. Forget about Cash.
So how do you influence what loot the vault contains? When doing the scoping out the vault mission, you will be able to see what the vault contains. If it's what you want, then good for you, you may leave the casino and move on to selecting the approach and crew. If however the vault contains cash or whatever loot you don't want, you can "change" the vault contents like this:

1. Leave the camera
2. Call Lester WHILST STILL IN THE CASINO
3. Cancel the Casino Heist
4. Leave the Casino and go back to your arcade
5. Pay another 25k to start the heist again

The vault content will already be revealed. If it however still contains the unwanted loot, leave your arcade, call Lester to cancel the heist again, re-enter your arcade, start the heist for 25k again. You will then have to do the vault content mission again and if it still isn't the wanted loot, you may repeat the tactic above.
Don't worry about the 25k that you'll pay each time you restart the heist, good compared to artwork is worth about 200k more so you will have plenty of chances before losing money.
The following describes a controversial glitch that may be used to gain more loot than you're meant to, if you don't want to do this glitch, then you don't have to, but some people will obviously want to do this.
For the glitch, you need the vault to contain Gold. I would usually write this in the finale section but this may influence your decision on what loot to pick so I see this as a more fitting place to write it.
When inside the vault, the gold will be stored on several carts across the vault.

1. Go up to one and press E to start collecting the gold.
2. Collect every bar but stop at the last one
3. Press right click to stop the looting whilst there is still loot on the cart
4. Wait 2-3 seconds infront of the cart
5. Press E to start looting again

Voila, the cart will be full with gold again and you may now collect all the bars. This can only be done once for each cart, so after "filling up the cart" once you can collect all the loot off of it without losing anything. This way you can get up to ~3,7 million worth of gold. You will be able to collect more but the rest won't be added to your total, so you might aswell stop at that amount and leave the vault.

3: Different Approaches

1: Silent and sneaky
This approach involves you sneakily going into the casino with silenced weapons, sneaking your way to the vault and then getting out undetected again. I recommend playing this with people that are willing to communicate. I'm not saying you shouldn't pick this if you have to play with randoms, just make sure they are capable of cooperating before you start the heist.
The pros of this approach are that you will have ~3:25 minutes inside the vault and that you wont get shot (hopefully) so you wont lose any loot. This approach also lets you casually empty out the secondary vault opened via the security center (more about that in the finale section)
The obvious cons are that you need to have teammates capable of cooperating so they wont rush in, alert the guards and make you lose your sanity. The detection system is also very inconsistent and things that you might think wont alert the guards will turn out to do so, sometimes.
For this approach I recommend getting the artwork loot if you are just 2 players and gold (w/o glitch) if you are more than 2
The prep missions that may be skipped for this approach are:

1. Power drills, since the lockboxes inside the vault don't pay that much and it takes time to drill them open that can be used to loot the main contents

2: Big Con
You enter the casino in disguise and get out in disguise, making you lose no loot from being shot like in the silent approach.
First of all, USE THE GRUPPE SECHS UNIFORMS. For the gruppe sechs uniforms to becaome available, you have to photograph the security tunnel of the casino (see image below) By using the gruppe sechs outfit, you can walk straight into the vault without needing to kill anyone.
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Service tunnel location
This is in my opinion the best approach since you can easily stay undetected the whole time and it leaves very little chance of failure by stupidity and gives you the full 3:25 minutes inside the vault for looting.
Recommended loot is once again Artwork for 2 people, Gold for 3-4 people.
The prep missions that may be skipped are:

1. Patrol Routes. You will only have to kill a maximum of 2 guards and they will be near enough to pop up on your radar anyway
2. Duggan shipments. You will kill the 2 security guards with melee since your weapons don't have stabilizers and their armor doesn't save them from melee attacks.
3. Power drills, again, since the effort of drilling the lockboxes is not worth it most of the time

3: Aggressive
The most barebones approach involves you shooting your way through the casino and blowing the vault open. This is the easiest approach to do with randoms and can even be done with level 10s who just got their first million.
I recommend photographing the sewer entrance to shorten the way that you have to fight your way through (see image below)
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Sewer location
The recommended loot is always artwork since you won't have as mcuh time in the vualt, so the faster you get all the loot the better.
The prep missions that may be skipped for this approach are:

1. Power drills, obviously since you have less time inside the vault.

4: Crew

Crew choice, seems like a hard decision, really isn't. You basically want to pick the cheapest crewmembers who give you the best hardware.
1: Gunman
Karl Abolaji. For every approach. This might seems like a stupid decision seeing as he only gives you a sawed-off shotgun or heavy revolver for the loud approach, but you will actually get an SMG aswell, which is very usuable for the loud approach. If you don't feel comfortable with just an SMG, Pick either Patrick McReary or Gustavo Mota. Packie will of course be very hard to unlock (Guide to unlocking Packie here) but he will give you a combat MG for only 8% of the cut, whilst Gustavo Mota will give you a Carbine OR Assault shotgun (with the SMG) for 9%
For Silent and Big Con, Karl will give you Micro-MPs, which are more than capable of doing their job, that being killing guards in the silent approach. For Big Con, you could actually play completely without weapons since you only need to melee 2 guards.
2: Driver
Probably the least important crewmember. Some people don't even use the getaway cars provided. So of course, pick Karim Denz. He will be able to source oyu the Sentinel Classic, which is a more than capable Car for getting to the needed places (more information about getaway in the finale section) for the smallest cut.
Of course you may choose other drivers if you want to unlock the trade price for any of the vehicles.
3: Hacker
The most important crewman. Really the only viable choice is Avi Schwartzman, who can be unlocked by destroying the 50 signal jammers spread around San Andreas (Guide for 50 jammers here) He will give you the most time in the vault (Paige is an "expert" hacker aswell but she will give you ~15 seconds less inside the vault) Don't even think about all the other hackers, the hacker is no place to cheap out.
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Ideal crew layout

5: General Prep Work

Alright, in this section I'll go over all the prep missions and give some tips and hints on what to do and what not to do and what vehicles work best. First of all, don't buy any of these preps for 70k, they're all somewhat easy to do and shouldn't be a problem for a solo player.
1: Untraceable weapons
This mission is be annoying but also easy. There are lumtiple types of this mission, and whilst none of them are a true challenge, they can be annoying to do since you have to either fly/drive a slow vehicle or collect 2 crates.

• Noose Vans: There will be 4 Noose vans around the map and you have to blow the back door off to check for the weapons. You cannot lock onto the vans with homing missiles, so you either have to have good aim or use stickybombs in a ground vehicle. After finding the right one, you have to take it back to your arcade, after losing a wanted level. The annoying thing is, you cannot call Lester to lose that wanted level and the Van is very slow, I recommend driving through a tunnel where the cops cannot go to lose them.
• I/E crew: You have to fly to the shore and find A couple of guys exporting the weapons, just blow them up or murder them any way, get in the Tula and fly to Sandy Shores airfield. When taking off in the Tula, switch to VTOL mode and gain some forward speed and altitude before switching to normal flying.
• Lost MC/Vagos: You have to go to the clubhouse of the Vagos or Lost, clear the hostiles, find the weapons inside the clubhouse and bring them to your arcade. You will probably die the first couple times you try this mission, but you'll get the hang of it eventually. If you get the Lost MC mission and you have an arcade in LS, I recommend just finding a new session if you're alone since flying to Paleto Bay twice can be very time consuming.

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A weapons case inside the Lost MC clubhouse
2: Getaway cars
This mission is somewhat easy for all types, but of course it's much faster done with a friend since you will have to get 2 cars most of the time.

• Police warehouse: You have to go to a vehicle warehouse of the police and get the 2 cars out of there, don't worry about the sounds of the engines when in the warehouse, the cops inside seem to be deaf. When driving outside, be careful not to alert the cops standing outside or you'll have to lose your wanted level first.
• Valet: You go to a hotel, scare away some valets, dress up as one and wait for the cars to arrive. Nothing much can go wrong here. The only things you shouldn't do is shoot or knock out the valets and bump into somebody infront of the hotel. Just simply bring the cars to your arcade and you're done.
• I/E crew: You have to take the cars off a crew who just imported them. Just go to the location, kill the goons and take the cars. Watch out however, the enemies have extremely good aim and even a single enemy can kill you in a couple of seconds. Just use your homing rockets (don't worry, the getaway cars can't be blown up) to kill them, get the cars and bring them to your arcade.

3: Hacking Device
Seems like a simple mission, and it is. There are only two types of this mission, and they are both somewhat easy.

• FIB: Collect a security pass off an FIB agent by brutally slaughtering him and his fellows, go to the FIB office, find the briefcase with the hacking devise, get out, lose the cops and bring it to your arcade. When killing the FIB agent, an exploded vehicle may block the agent's corpse. Just get another car to push anything away. There is also a bug where the corpse will either always be considered as blocked or ont even appear, if that happens you have to find a new session and restart the mission.
• Noose: The early part is pretty similar to the FIB type, you collect a keycard off of an agent, enter the Noose building and use your phone to find the hacking device. When you get out of the Noose building, the alarm will always automatically go off, just fly away with your OppressoAkula etc. and lose the cops before bringing the hack device to your arcade. You can also assassinate the agent silently when collecting the keycard by approaching him, waiting for him to go away from the other 2 agents and then bopping him in the head with a gun, but form my experience its faster to just blow him up since you'll most likely lose the cops on the way to the Noose building anyway.

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The briefcase you're looking for
4: Vault Keycards
This one has 2 mission types. In one you just go to two guards who have the keycards, eliminate them silently by smacking them in the head with a weapon and then looting their keycards.
The other mission is a bit more complicated. It involves you getting a prison bus and entering the bolingbroke prison in that disguise tho then silently murder a guard there who has the keycards. You actually don't have to collect or even blow up the bus, you can fly straight to the prison, kill the guard and get the keycard. Keep in mind thatr you wil get 4 stars doing it this way and there are snipers on the 2 adjacent towers to where the keycard guard is, so you'll wnat to kill those first before looting the guard.
The recommended vehicle is the Oppressor Mk II just to get around faster, but the Akula is a very viable choice aswell to lose the cops more easily after flying to the prison.
5: Guard Patrols
Pretty straight-forward mission. You go to a Duggan security meeting, kill all the guards, find the correct car, photograph the plan and then get out.
This mission can be done stealthy, but it's basically impossible, you're better off juzst shooting them straight away.
The correct car will always be a Felon GT and there will always be 3 of them in the same positions, so you get the hang of where to go after doing it a couple of times.
Once again the Oppressor and Akula are your go-to vehicles for this mission, but DO NOT use the rockets to blow up the guards, the chance of accidentaly blowing up the car with the plans is not worth the risk, and I suggest you also dont use a Minigun since that can also bvlow up the car pretty quick.
6: Duggan Shipments
This is the most stressful prep. You need to destroy 10 of Duggans shipments in 10 minutes to weaken the guards inside the casino. The easiest way to do them is with any chopper with rockets (Akula, Hunter, Savage etc.) or the Oppressor Mk II (you may need to fly an optimal route so you have enough time to destroy all of them.
It is actually no neccesary to destroy all of them, for the silent approach destroying 2-4 is sufficient to make the guards not have helmets (you don't want to bodyshot them anyway, that might make them sound the alarm) but for the loud approach, it's best to destroy all 10 of them so that the guards only have Pistols and Micro SMGs.
If you fail to destroy all 10 in time, you can quickly leave the session before the time runs out and retry the mission.
7: Security Intel
This prep is unlocked after completing the 6 Casino missions unlocked by buying a Casino Penthouse. It can only be done once, so you won't have to replay it every heist.
The mission is simple, you go to a mall, meet Vincent, get the stolen car back for him (use a vehicle with drive-by weapons, helicopters and the Oppressor aren't good for this mission) and done, you can now see all the cameras inside the casino.
8: Power Drills
This mission also has 2 types, but the van one is much rarer. The common one involves going to a construction site and getting 2 power drills.
When you get to the cunstruction site, there will be a white icon on the map. Go there and equip the helmet (your character may remove the helmet shortly after equipping it but the disguise will still work) then just go and check the boxes for the power drills
YOU CAN CARRY BOTH DRILLS AT ONCE! That way you don't have to fly all the way to your arcade and back to collect the other drill.
The second type involves stealing a van with the drills inside and taking ti to your arcade. Simply use a vehicle with drive-by weapons (Once again no chopper or Oppressor), kill the driver AND passenger (he will get on the driver seat after the driver dies), collect the van and take it to your arcade.
9: Security Pass
First of all, ALWAYS get the level 2 security pass (the one showing a valet and croupier on the mission picture) The level 1 pass will only get you through the outside doors whilst the level 2 pass will open all doors except the level 3 ones inside the vault.
Once again, two types of this mission may occur. The first involves you stealing a hearse from a church parking lot. You will then have to lose a 2-star wanted level and drive to a hospital where you then have to find the corpse of a valet and get his security pass. When entering the hospital, your character may automatically have a weapon drawn, so pay attention to that before running through to the corpse.
The other type has you going to the party of a croupier, waiting until lester found the right guy and then take the security pass off him. When you get to the party, there will be a pavillon with people dancing, just go there and start dancing until lester has found the right guy. When you then search the croupier for the pass and it's not on him, just search for a small purple keycard (it can be somewhat hard to find but it will always be in the same locations) and collect it.
As for vehicles, anything goes. The Oppressor will probably get you where you want to go the fastest.
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The pavillon that you can dance under

6: Approach Specific Preps

Silent approach:
1: Drones
You have to destroy 5 drones spread around LS and collect their parts. Pretty simple mission, use something with rockets (Oppressor will have better rockets than Helicopters) and blow up the drones. You can of course carry all 5 drone parts at once.
It can be tricky to lock on to the drones as you will also lock onto the cops if you have a wanted level, just swap from non-homing to homing rockets if you locked onto the wrong target.
2: Laser drills
This can be a difficult mission. You will either have to take the two drills off the military, which may be hard since they are very accurate and theres a lot of them, but you can use you Oppressor or Akula rockets without worrying about blowing up the drills, just be sure to stay far enough away, their aim is surprisingly good. Be careful when collecting the first laser drill, if the cops kill you your Oppressor may be impounded and you have to use a different one.
The second type will be to take the drills from a bunch of Cliffford soldiers (apparently they're still around) which is way harder than the military since the cliffford soldiers are EXTREMELY accurate and there will even be a juggernaut and snipers. I don't recommend using the Oppressor for this as you are very vulnerable when standing still, go with an Akula instead. Just kill all the soldiers, enter the warehouse, kill some more soldiers, take the drills and get to oyur arcade.
3: EMP
Another pretty easy and simple mission, you will have to collect a cargobob (with an extra long cable) from the airport, fly to the LS University and steal their EMP. Then just fly to the drop-off, lose a 3-star wanted level by evading the helicopters and drop off the EMP.
Some people skip this mission and the next one, but I use the EMP during the finale to casually do the last hard part so theres no risk of screwing anything up. If you are however coordinated enough to not need the EMP, then you may skip this and the next prep
4: Stealth Uniforms
I highly recommend paying for this mission, it can be very annoying and you get the 70k back from the finale anyway.
This mission involves you going to humane labs and assasinating guards silently (very similar to the infamous deliver EMP mission) and getting the uniforms from the garage where you would park the insurgent in the Humane Labs Heist. This mission can be done quickly if you have a buddy, if you don't, it's better to just skip it and pay the 70k (If you don't plan on using the EMP you don't need to do this mission anyway, it's only for the night-vision equipment)
Big Con approach:
For this one, I'll only talk about the group sechs uniforms, since this is the easiest method of doing the Casino Heist by far. If you want to use a different uniform to unlock it, go ahead, but do be warned that it will be significantly harder to fully stealth.
1: Group Sechs, part 1:
Simple mission, go to a mechanics repair shop, kill the mechanic after realizing the Stockade is locked, get the keys and drive away. You will get a wanted level, but you can call Lester to easily lose them.
2: Group Sechs, part 2:
A bit harder, but still pretty easy. This mission is similar to the Patrol routes mission, you have to go to a group sechs meeting, kill everyone (this can also be done stealthy, but its again almost impossible), photograph the license plate of the black stockade, send it to Lester and then get the equipment and bring it to your arcade. Again as with the Patrol routes mission, do not use explosives to kill the guards as you might accidentaly blow up the equipment. You can call Lester to get rid off your wanted level.
3: Vault drills
Yet another simple mission with two types

• Fleeca: A crew of bankrobbers will be robbing a Fleeca-bank with the needed drills. Go there, kill em, get their drill, lose the cops, bring the drills to your arcade. Pretty simple, but you cant call Lester, so using an Oppressor or Akula is beneficial.
• Heist crew: A bunch of heisting dudes are being arrested by the police. Go there, kill em, get their drills, lose the cops, bring the drills to oyur arcade. Pretty simple, but you can't call Lester, so using an Oppressor or Akula is beneficial....hm, I'm having quite the Déjà vu.

4: Escape Outfits (Noose)
I'm choosing Noose outfits because they look better (and I'm sure they are in some way better than the Firefighter uniforms, I just don't know how, you seem to get spotted in the Noose uniforms aswell)
Simple (yet somewhat difficult) mission. Go to the mission row police station, kill all the cops there, find the Noose equipment, loose the cops and bring them back to your arcade. You can't call Lester to lose the cops so an Akula would be helpful. When collecting the second uniforms doing it solo, you will once again get 4 stars, so be ready to evade the cops again. Also, when you die at the police station, the cops will most likely impound your vehicle, so a careful approach would be better.
Aggressive approach
1: Thermal explosives
Loud has some pretty annoying mission, this being the first one. Once again, there are 2 types of this mission

• You have to go to some rednecks and get the explsovies off of them. Just kill them all (once again no need to worry about blowing anything importnat up) and collect the boxes. They have a pretty big pickup distance so collecting them in a Helicopter should be no problem
• SecuroServ Warehouse: Go to a warehouse, kill some people outside, kill some people inside, find the explosives, bring them to your arcade, no cops, pretty easy.

2: Vault explosives
This may be the most annoying mission of the entire heist. You have to go to a crash site of a plane, dive to the wreck and collect the explsovies. If you own one, put on a diving suit BEFORE starting the mision, you can't access the outfits during the mission.
When arriving at the crash site, you can dive straight to the plane if you have a scuba suit equipped, that saves you the killing and you won't get shot at instantly. Otherwise you have to kill some goons and equip a scuba suit nearby marked on your radar. When you collect the explosives, 3 helicopters will spawn. When you get out of the water, kill the gunners inside the helicopters, not the pilots. The helicopters would respawn and by only killing the gunners they will just follow you without shooting you.
3: Improved armor
You'll probably want to buy this prep, since this mission can also be very annoying. Two types of this mission, both are very unpleasant.

• Humane Labs: Go to the beach at humane labs, get into a scuba suit, dive through the cooling tunnel into the facility, find the armor and bring it to your arcade. This mission may not be that hard, but the long swim and indoor fighting stretch out the mission and it quickly becomes repetetive and boring. There will atleast be a buzzard when you get out of the facility.
• Merryweather bunker: Enter a bunker, kill the merryweather goons, find the armor and bring it to the arcade. Simple mission on paper, but the enemies will probably kill you atleast once and the armor sometimes can be tricky to find, I once spent 15 minutes searching the armor.

4: Drill
Simple mission and only needed if you plan on entering the casino through the sewers. Just go collect a truck with the drill loaded onto it, drive it through the water channel and into the sewers.The time you save by going into the casino through the sewers is probably negated by the time it takes for this mission, but having a more relaxed finale is certainly worth doing one more short prep mission.

7: Silent Finale

Alright, it's finally time for the big moneys, the finale. For this approach, you'll want to go in through either the garbage disposal or personnel room and go out through the personnel room. ALWAYS choose the high end buyer, he will give you the most money.
The finale starts very simple, you drive to the casino and enter through the door you chose. Careful, there will be a camera that you need to zap using your stun gun. When inside, there will be metal detectors that you need to disable by shooting the current box with the stun gun. Sometimes there will be guards watching the metal detectors, in that case you need to take them out before you go through.
When taking out guards, it's better for player guy to kill 2 guards facing eachother, as internet issues may cause in the alarm being raised even if the guards are killed simultaneously. You have more than enough time between shooting the first guard and the second guard raising the alarm that it shouldn't be a problem, just make sure your teammates stay back and don't interfere with the player killing the guards.
After clearing the first area (see picture below), you enter the security room through one of four doors (most of the time 2 of them are locked, can be seen by a red display on the keypad instead of the blue diamond) and then wait for the guard in the hallway to move out of the cameras sightline (Do not worry about the glass at the security room, for some reason guards can't see through it. The y can however see through the glass of the doors) Then you follow him (watch out for the camera) and shoot him in the head. Feel free to then clear the secondary vault by one play opening it for another player to loot (theres another button to open the vault inside, the player pressing the button only has to let him in) and then USE THE STAIRS to get to the vault floor.
When going down the stairs, a guard will walk up the stairs, shoot him in the head, disable the camera in the stairway and make your way all the way down.
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Getting to the stairs undetected
On the vault floor, go out of the stairway and take out the 2 guards to the left. Then set off your EMP (this will also obviously disable the cameras) by having the host open their phone and using the securoserv-hack. The lights will then go out and you can rush into the main lobby and take out the 4 guards there. You can ignore the last guard inside the security room, just go to the keypads, swipe both at once and enter the mantrap.
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Getting to the mantrap undetected
When at the vault door, 2 guys get out their laser drills and start drilling. The drilling is very simple, you just keep the drill as hot as possible whilst not overheating it. When inside the vault, take as much loot as you can but make sure to leave the vault before the time runs out (I recommend stopping the looting with 20-25 seconds remaining to ensure you have enough time to get out).
When getting back into the vault lobby, there will be 2 guards walking past the stairway, you can ignore those, just use the stairs to go up again (and don't forget to disable the camera in the stairway)
When back in the main floor, follow the route shown in the picture below whilst taking out any guards in the way (2 will be in the security room, you can ignore those) and leave the casino through the personnel door. Don't worry about the metal detectors whilst going out, they dont seem to alert the guards.
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Getting out of the Casino undetected
When outside, again follow the route shown on the picture below to get to the getaway cars (locations may vary with different drivers) and drive into the sewers. Then spend some time in the sewers by either waiting or driving to another exit (I personally like to drive to the exit right at the highway so that the drive to the buyer is as fast as possible) Make sure not to drive too close to the Casino, as that will get you 5 wanted stars. I recommend avoiding the freeway next to the casino, you may however use the road to the north-west of the freeway.
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Escape route with getaway car locations in pink (when choosing the 5% driver)
Then just casually drive to the buyer after you've lost the cops and there you go, fat loot.

8: Big Con Finale

This is the easiest finale by far. Choose the group Sechs entry uniform, noose escape uniform, the personnel rooms as the exit and of course the high end buyer.
Take the Group Sechs truck to the Casino and through the service tunnel, wait until the guard lets you through, park it on the yellow marker and use the elevator or stairs to get to the vault floor.
On the vault floor, just run to the keypads for the mantrap. The guards don't care if you're running or even jumping, just don't bump into anybody and don't draw your weapons.
The just casually loot the vault and again, make sure to get out before the time runs out (stop looting with about 25 seconds left to have enough time to get out safely.
Then just walk through the mantrap and the vault lobby again but USE THE STAIRS to get to the main floor (the camera will not raise the alarm, don't worry about it). Make sure you are all past the camera before going to the main floor, as anyone who didn't go past the camera will get detected due to the guards being alerted and a wanted level appearing. When at the main floor, use the route in the picture below to get to the Noose outfits and switch into them to walk past the last few guards without any problem.
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Getting out of the Casino with the Noose uniforms
When outside, follow the same route as in the silent approach to get to the getaway cars. Drive into the sewers, lose the cops in there and then again casually drive to the buyer whilst avoiding driving to close to the casino.
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Getting to the getaway cars and into the sewers undetected

9: Aggresive Finale

There really isn't any major explanation needed for this approach, as you won't have to worry about getting detected.
If you chose to enter through the sewers, drive there, enter the tunnel that was dug with the giant drill and plant explosives at the wall to gain entrance to the vault floor directly.
Then just shoot your way to the mantrap keypads and have the others protect the people opening the mantrap if you are playing with 3 or 4 players.
When looting the vault, you won't have to worry about getting out in time, and the nerve agent does very little damage, so don't be scared to take longer than the timer says.
Whilst shooting your way out of the casino, you may use either the elevator or the stairs to get to the main floor. Going through the security room allows you to evade any guards that may be in the south corridor.
When you get out of the casino, you may follow the same route as in the undetected approaches or run directly to the getaway vehicles, although you will probably get shot more doing that and therefor loose more money.
Get to your cars, drive into the sewers and lose the cops. Then you're just one casual drive away from making another bunch of cash. I highly recommend getting bulletproof tires for your getaway cars on this approach, and whilst you are spending that 10k per car, why not go big and get the 15k upgrade that laos makes the cars go much faster.

10: Tips and tricks

So in this section (which I will probably expand with additional tips, feel free to leave some in the comments) I'll go over some of the things I didn't mention that may save some effort or time when doing this heist.

• You can lose the cops by going into the back of your Terrorbyte if you aren't carrying any equipment (useful during the untraceable weapon mission with the Noose van)

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That about covers it for this heist. This has unexpectedly been quite the project for me, it took me 3 days of writing here and there and getting screenshots, so leaving a smol updoot would be appreciated. If you have any questions, of course feel free to leave a comment, I'll try my best to read every single one of them :)
Happy heisting! (and may your sessions be free of griefers!)