Unpack the contents of the archive, run the trainer, and then the game. During the game you will be able to use the following keys:
Num 1 - full health
Num 2 - Unlimited sprint
Num 3 - no reload
Num 4 - 99999999 green gel
Number 5 - 99 keys
Num 6 - all crossbow parts
No. 7 - Turn off all facilities
Note: Trainer works with version 1.0 of the game.