While playing You'll ahev to press [F8] to bring up the console. Then type any of the following cheat codes. Use up and down arrow to cycle through previously used codes.
Set 1 - With these codes, please include externInclude developer: in front of the code. For example: externInclude developer:open_door to open a door.
main - Developer Scripting/Keys Enabled (*)
open_door - Open Door Close to You
openallremotedoors - Open All Remote Doors
closeallremotedoors - Close All Remote Doors
immortal - God Mode
stuffed - God Mode, Full Health, All Weapons, etc.
spawn_alienattack - Alien Attack!
reloadstuff - Ammo for All Weapons/Flashlight
givestuff - All Weapons
fullhealth - Full Health
giveallkeys - Get All Keys
loseallkeys - Lose All Keys
warpforward - Warp 300 Units Forward
warpmore - Warp 3000 Units Forward
(*) The debug menu is a text menu, where you use [F2] and [F3] to select which option you want. Then you use [F4] to accept that option. There are sub-menus for some of the choices too. After an option is selected, you can repeatedly hit F4 to re-run that cheat multiple times.
Set 2 - These codes do NOT need anything entered before them.
hideGUI - Hide GUI
showGUI - Show GUI
disableAllAI - Disable All AI
enableAllAI - Enable All AI
enableHostileAI - Enemies Don't Move
disableHostileAI - Enemies Move Again
setMissionSuccessCounter 1 - Win Current Mission
setMissionFailureCounter 1 - Lose Current Mission