PAYDAY 2

Start a Meltdown heist on any difficulty, get down from the roof using either the ziplines or the ladder and get into one of the forklift trucks dotted around the yard. The achievement will unlock straight away. This is notably quicker than the original requirement of Car Shop as its the start of the job.

0. Complete the following preliminary tasks.

The following heists must be done on Normal or above:

• Golden Grin Casino
• Breakin' Feds
• Henry's Rock
• Shacklethorne Auction
• No Mercy

And this heist must be done on Overkill or above:

• Brooklyn Bank

Finally, spend Continental Coins to upgrade Scarface's room in the safehouse to maximum level.
Upon completion of the above, you will have six trophies in your safehouse and a piano in Scarface's room.
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1. Enter your safehouse. In the Upstairs area, use the Brooklyn Bank trophy, the Medallion, to unlock the three boxes, the "Coffers", and assemble The Device with the components they contain and the Obsidian Tablet.
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2. Go into Scarface's room with any single-shot weapon (a pistol or rifle is preferable) and shoot the keys to play a specific melody on the piano.
   Talking to Duke or looking it up will clue you in.
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3. You can now interact with The Device to get blocks of ancient script. This language is actually english, both spelled and written right-to-left in a symbol font. You can find cheat-sheets on how the alphabet translates elsewhere.
   You must translate the script to get twenty different passages about different accomplishments by "Four Thieves." These are actually riddles linked to Steam Achievements, picked from a pool of 57. If you repeat Step 3, your pool of 20 achievements will be re-rolled.
   Complete every achievement, and you will achieve Worthiness, allowing you to perform the following steps.
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4. Go to Crime.Net and start The White House, one of Locke's jobs, on Overkill or above. Your party must be comprised of only other "Worthy" Players and/or Bots.
   Play the heist until you get to the PEOC. You will find a painting in a boardroom is glowing, and you can interact with it to move it, revealing a crack in the wall which you can blast away using C4 given to the host.
   Enter the cave that is revealed by the destroyed wall, and enter an elevator at the back. Slowly, the elevator will descend to reveal a large code wheel on a wall, and four levers.
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5. Solve the code wheel four times. This is no easy task, as it gives you a random riddle with a vague answer, all written in the same script as the tablet.
   Not only that, but the whole time you are doing this, you will be assaulted by the occasional spawning of Ark Guardians, ethereal beings that behave like Cloakers. Each answer is five letters long, three of the levers are used to spell it out in a guide on the wheel. The first lever, at top left, confirms your answer. If you are right, you go forward one riddle. If wrong, you go backwards.
   Once you finish all four riddles, the wheel will rise, revealing the wall to have been a door.
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6. Enter the Ark of the Watcher past the open door. Wander around it, getting a good look at it (and Baldwin's corpse), until you hear the voice of The Dentist, who will demand you to let him in.
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7. Go back to the entrance. Wait for the door to open, and Shoot The Dentist in the head. Do not get too close nor wait around, or Bain and Locke will die, and you will fail instantly.
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8. Grab the bag of Mayan Gold and return to the Ark. A Point of No Return timer will start. Insert Gold into the empty slots of the Ark, one bar at a time. And make sure you hurry, you don't have long!
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9. Once you have completed the gold-slotting process, you're done! The heist will be completed, going to the results screen, and you will unlock the achievement.
   Be sure to restart your game to install a DLC you will be given, "Offshore Payday", which will grant you access to a set of six Secret Masks and the live-action FMV containing The True Ending of Payday 2.

Just like the Viper Grenade Kills, i recommend doing this on Counterfeit, sit at the Bottom of the Basement Staircase in Mitchell's House and let the Cops funnel trough the top, easily can get multiple Kills with one Shot.

I recommend doing this on the Map Counterfeit, go to the Basement of Mitchell's House, trigger the Alarm and then just stay downstairs with the bots. Cops will funnel trough the Top of the Staircase where you can throw the Viper Grenade, and that should bring you the Achievement in one, maybe 2 Games.