During the game, press T and type one of the following codes:
God mode: god
All ammunition: ammo
All weapons: guns
All weapons, ammunition, health, armo: rkfa
Scopes, silencer and camera zoom: mods
Full armor: armor
Full health: health
Invisibility: poltergeist
Level skip: maphole
Get Skill points (level 3-4): skillz
Stronger explosions: baddaboom
View position: pos
View version number: build