PAYDAY 2: CRIMEWAVE EDITION

This has to be done during the heist "The Diamond" which is contracted by the Dentist. In order to get this you have to steal 10 of the artifacts that are in the glass cases around the museum. The ones that you are able to steal will have a little sticker on them that says "gen sec". They spawn all over the museum and can even be on the walls or behind the timelocks in the room right before the diamond.

If you're planning on doing the mission stealth I would highly recommend buying the glass cutter and the additional bag man from the pre planning menu. If you're going loud just smash the cases open and steal the artifact. The pilot can only take 4 bags at a time, so I suggest picking up a few at a time so the cops don't take the bags. I did this solo on normal difficulty without much trouble.

Level: The Diamond available from The Dentist contact
Difficulty: Any
Players: 1 to 4
Required Skills: None

When you have completed the heist objectives and your escape arrives, you will need to collect ten additional bags of loot to take with you. These can be found around the level in glass cases. You will know which ones you can take as they will have a red and blue "Gentec" sticker on them. After loading four onto the helicopter it will leave and come back so you will need to do a few runs. Be aware that the diamond itself counts as an additional bag on the stats screen, but not for the achievement, so you will want this to say 11 additional bags. I tried with it saying ten collected and I did not get the achievement. Also be careful not to smash some of the vases as these can only be collected if they are in one piece. On my first attempt I accidentally smashed one which left me with nine additional bags to collect and I had to restart. Don't forget about the red gallery on the floor below if you are struggling to find enough bags.