The game MUST be on Overkill or Overkill 145+ difficulty. The main thing is to bypass all 3 alarm boxes, then go ( the best undetected ) to the vault doors at the bottom of the Atrium and enter the security codes.



If the codes are not working, restart the map by reset option if on Singleplayer, or walk to the 23rd floor and jump down to Atrium, killing yourself and resetting the heist ( prefered on Multiplayer ).

Go into the vault, and you have 2 cameras there.



Destroy them, using melee or a silenced weapon.
Do NOT break any glass on the diamond cases , or the alarm will start. You can still get the red diamond, but cops will spawn in the vault and will probably kill you. Run right and there should be some big iron doors with a red button.



If they are not, restart the map. Open the door and walk into the room. ( Do NOT melee or shoot the glass, or a barrier will close, and the diamond will be unaccessible. It is the same for cops, so do not let them shoot the glass). There are 2 cameras, destroy them.



Get closer to the glass, and a yellow place for the Glass Cutter will appear.



Move onto step 3.

The Glass Cutter is on the place where you spawned in the beginning of the heist. Get to the spawn from vault ( the best undetected ) and take the cutter.



Then return to the vault and place the cutter on the glass.



You will see an Assault emblem down the screen, and an Assault music will play, but you are still undetected. Now, just wait 5 minutes until the cutter cuts through the glass, move it away, and take the diamond.

If you took the red diamond, be quick. Break the glass on the cases with the diamonds on the floor. Leave the rest, it is not needed, saves time and your life. Right when you break the cases, alarm will start and when you take all the diamonds, endless assault starts. Take the diamonds, then quickly run to the stairs near Cantine.



Then, you will run upstairs or downstairs, depending on where the helicopter will be. I suggest taking a Medic Bag, placing it down on the stairs and healing up if you lost any health. ( not needed, but prefered ).

I realy hope you enjoyed my quide, it is my first quide. Leave a like and a comment of what you want next, if the quide helped you and so on. If I will have time, I will probably make more quides. Gmod4phun

ALIENWARE HOXTON FTW!

So, you wanted a video, here, you can have it. Special thanks to Melon and Snake, my awesome friends and one of the best PAYDAY Players.

Not very HD, best I can do. Remember, put on 720p :D


Hope you enjoyed the video.