Terracide
 
 Cheats:
 (Enter under the Help Menu option in the Cheat Codes 
 password box) 
 
 Code Result
 barnsley - Invincible mode on/off
 nozzle - Access to all episodes and levels through
  the Game-Levels Menu option
 popov - Go anywhere mode on/off
 clam_chariot - Loads of cheats (including all guns)
 welk - All guns available
 phaal - Unlimited ammo on/off
 batfinc - Full shields
 drugssuck - Numbers displayed on screen on/off
 top_trumps - "Go anywhere mode on" message displayed,
  but it doesn't work
 yams - "Go anywhere mode on" message displayed,
  but it doesn't work
 
 The following may also be cheat codes, but no message 
 or effect was noticed.
 
 activate
 gimme_guns
 Level
 Episode
 Options
 Links
 puff
 frei
 Pizza
 Mobil
 Energie
 Camp
 Otto
 Klage
 Hebel
 gnade
 bibel