Here is the full list of all 22 ChromaGun achievements.
Grill 100 WorkerDroids on Deadly Maintenance Tiles.
Find the hidden cake we actually have, as opposed to that other game that doesn't have a cake.
Finish Chapter 8.
Finish Chapter 7.
Finish Chapter 6.
Finish Chapter 5.
Rescue the WorkerDroid in Chamber 5-2.
Finish Chapter 4.
Finish Chapter 3.
Try jumping over a Deadly Electrified Maintenance Tile... and fail horribly.
Grill a WorkerDroid on a Deadly Electrified Maintenance Tile.
Simply walk onto the Deadly Electrified Maintenance tile in Chamber 3-1.
Finish Chapter 2.
Try painting a brown WokerDroid and realize how pointless that was.
Mix a color. It's not that hard, really.
Finish Chapter 1.
Get killed by a WorkerDroid.
Open a door by activating a trigger.
Fire 100 shots.
Shoot a WorkerDroid.
Solve a chamber in chapter 7 without firing a single shot.
Try jumping... and fail.