During the game, press F10 and enter the following codes:
God mode: godgames
Restore health: healme
All weapons and ammo: winblows
Extra ammo: moreammo
Flaming tip arrows: burningstake
500 Silver bullets: silver
500 Aqua Vampire bullets: aqua
500 Mercury bullets: mercury
Shotgun and 500 shells: shotgunshell
Elephant gun: dumbogun
Tommy gun: driveby
Flame-thrower: torchmyass
Wooden stake crossbow: woodenstakegun
Radiance Emitter: amonra
Gas mask for stranger: ifarted
Recharge battery: recharge
Skeleton key: skeletonkey
Appear like Terminator 2000: t2000
Big head mode: bighead
Stranger wears alternate hat: oldhat
Kill nearby enemies: bigboom
Kill surrounding creatures: ebola
Toggle enemy AI: freezer
Toggle gratuitous dismemberment: goremode
Toggle rain: thunderstorm
Toggle snow: snowstorm
Display message: goldmode