Press [Talk] (with key T) during game play. The game will freeze, but has not crashed. Enter one of the following codes, then press [Enter] to activate the corresponding cheat function:

Effect - Code

Full ammunition - ammo
Invisibility - notarget
Invulnerability - god
All weapons - guns
Full armor - armor
Full health - health
Position mode - pos
All weapons and unlimited ammo - tears
Ghost mode - poltergeist
Increase health and reflexes - gear
Level skip - maphole
Weapons, full ammo, armor, health - kfa
Spawn indicated weapon - gimmegun [name]
Spawn indicated ammunition - gimmeammo [name]
Display build version - build