Here is the full list of all 14 My Night Job achievements.
10 rooms being stomped at the same time
Reanimated 20 times by the syringe
Used the rusty key 20 times
Eviscerated 300 enemies as clown
All enemy types have been shot down
Beaten 30 gargoyles to death barehanded
Delivered 30 ghosts to the underground trap
Walked for more that 1000 steps
More than 1000 people rescued
All 6 special survivors rescued in one shot
Keep 99.9x multiplier for 2 minutes
Break every object in the house
Get all trophies in the trophy room
Take someone for a tour in every single room