Here is the full list of all 21 Nightwatch: Nightmare Creatures achievements.
Fix the electrical panel
Fix the oxygen generator
Go to advanced settings
Start the first shift
First time enter the game
The patient killed you
To complete a shift without dying
Dont leg oxygen go bellow 50%
Survive a night without any character dying and without electricity at least 30 seconds
Complete shift 1 in cooperative mode
Complete shift 2 in cooperative mode
Complete shift 3 in cooperative mode
Complete shift 4 in cooperative mode
Complete shift 5 in cooperative mode
Complete shift 6 in cooperative mode
Complete shift 1 in single mode
Complete shift 2 in single mode
Complete shift 3 in single mode
Complete shift 4 in single mode
Complete shift 5 in single mode
Complete shift 6 in single mode