Start the game and type them in!
NOTE: They might cause the game to crash so use at your own risk!
LINUSISGOD - The player becomes immortal for a while
INUXRULES - The player receives full health
VOLATILE - You get the flamethrower
ILIKETOSKATE - You get the Ice-weapon, brrr...
KABLAM - Ahh...the grenade-launcher
STARTREKFOREVER - Plasma and Startrek goes hand in hand
LETSROCK - The minigun!
SITINTHECHAIR - The electric-gun
FIREAWAY - You get 1000 rounds for your current weapon
TALKINGTODEATH - All weapons gets 1000 rounds of ammo
THENIDIE - Max-ammo for all weapons
NVTRULES - You get all the weapons availible
LETMEIN - All keycards - no more looking!
THERECANBEONLYONE - Clear the current level
TIMETODIE - hmm...player can kill by touch
MICROSOFT - Player dies a horrible death
RETURNOFMRA - Issues an airstrike at the current location!
If you have enabled cheat codes (./configure --enable-cheat-codes):
F3-F8 :Enables weapons
F9 :Makes you immortal for a while
A :Increases the ammo
Q :Decreases the ammo