Game Cheats:
Press tilde while playing to get your console, then type in the following cheat codes:
Code - Result:
sv_cheat_godmode_1 - God Mode
sv_demon_1 - Demon Mode
sv_everything_1 - All Weapons
sv_keep_decals_1 - Bodies Dont Disappear
sv_less_monster_hp_1 - Monsters at 1 HP
sv_max_ammo_1 - Max Ammo
sv_max_health_1 - Max Health
sv_monsters_always_gib_1 - Monsters Always Explode
sv_perfect_finish_1 - Finish Level Perfectly