How to OverDrill!

1. Select First World Bank (easy mode is recommended)

2. The first thing you must do is drill the gates as you would do in a normal first world bank heist.

3. After you have drilled the gates, DO not Destroy any cameras, computers or TV's beyond the gates.

4. When you have gone in, all 4 players are going to have to go into certain positions that will unlock the second drill. The Map below shows where you have to stand in the lobby.

Lay Out
http://imgur.com/AFJTD9o

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5. If you hear a beeping sound of a C4, then it worked. Now return to the area at the back (where you pour the thermite) and there should be a metal door there. Now you have to drill it. The drill will take 2000 seconds (33.33 minutes) it is recommended that you hold off the police at the front door. PLEASE NOTE: THIS DRILL NEVER JAMS

6. While the drill is on, place the thermite and take all the money. Afterwards, you should go and place 2/3 C4 charges on the wall. This prevents all Law Enforcers from coming in from vents and elevators, meaning you will only have to hold off the front door.

7. Once the drill is done, the metal door will open and there will be a large tile floor in front of a closed vault. This is the time you need to enter the code to open the overvault.

Code Lay Out
http://imgur.com/ZpVBRva

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9. If you enter it incorrectly, the overvault will open with a green poisonous gas that harms you and you will have to start All over again. [No not just the code, the whole level so make sure you enter it correctly.]

10. Once you escape you will get the Overdrill Achievement.