Hit F10 and enter the following cheats: 
 
 Code - Result 
 
 GETINTOMYBELLY - All Weapons 
 BIGHEAD - Big Head Mode 
 GIBNPLENTY - Gratuitous Dismemberment 
 IWORKFORGOD - God Mode 
 T2000 - Terminator Skin 
 GIVEMEFAITH - Restore Health 
 BIGSTICKOFDEATH - Get Shotgun 
 MEDIUMRARE - Get Crossbow 
 GOODTIMESMAN - Get Dynamite 
 NOD3D - Invisibility 
 HELLFREEZEOVER - Freeze Enemies 
 BURNYOURASSOFF - Get Flamethrower 
 MEETMYPALTOMMY - Get Tommygun 
 RECHARGE - Restore Flashlight Battery 
 THEDOGFARTED - Gas Mask 
 ICANSEE - Night Vision Goggles 
 SMILEYNOMORE - Get Elephant Gun 
 SUNOFGOD - Get Charge Radiance Emitter 
 IAMAWIMPFORTHIS - 100 Bullets 
 WWBEWARE - Get Silver Bullets 
 VAMPBEWARE - Get Lith Bullets 
 DEMONBEWARE - Get Mercy Bullets 
 ISUCK - Easy Difficulty 
 IRULE - Hard Difficulty 
 COMBATISSCARY - Easy Combat 
 PUZZLESARESCARY - Easy Puzzles 
 INSTANTCRASH - Crash The Game 
 THUNDERSTORM - Create Storm (Even Inside) 
 SNOWSTORM - Snowflakes Fall 
 FLAMEONASTICK - Flaming Ammo 
 TIME - Slow or Speed Up Time 
 DARK - Darker Graphics 
 OLDHAT - Unknown 
 BLANK - Unknown 
 ITISDARKNOW - Unknown 
 GONEAWHILE - Unknown 
 RAISE - Unknown 
 NUKEFART - Unknown 
 STEP - Unknown 
 
 
 Hints
 
 The forest noises tape recorder settings are: 
 
 Bass 2
 Treb 5
 Freq 3
 Pitch 4
 Rev 
 
 The Mary Brown tape recorder settings are: 
 
 Bass 4
 Treb 2
 Freq 5
 Pitch 2
 Forward 
 
  
 Cheat Codes (demo version)
 
 During a gameplay, press [F10], then type one of the next codes to
 activate the cheat function:
 
 RESULT - CHEATS
 
 Invincibility - godgames  
 Extra ammunition - moreammo