Here is the full list of all 7 Butcherman achievements.
The base game contains 0 achievements, and there is 1 DLC pack containing 7 achievements.
See the hidden person on the stairs
Complete the game
Inspect all movie tapes
Open more than 20 drawers in the corridors
Was this a nightmare?
Try the wrong time on the padlock
Try to flush the toilet 4 times before the tank fills