Press CTRL + ALT + F3 during game play to display the console window, then activate the following cheats by entering the corresponding codes:

CHEAT FUNCTION - CHEAT CODE
Toggle God mode - CheatImmortality <0 or 1>
Restore life to 100 - CheatHealth 1
All weapons - CheatWeapons 1
10,0000 ammo for all weapons - CheatAmmo 1
Restore Hubbardium bar - CheatHubbardium 1
Level skip - CheatNextLevel 1 or leach
Set maximum oxygen you can store;
default is 100 - PlayerMaxOxygen
Set rate of health decrease when oxygen runs out - NoOxygenHurtTime
Set amount of health decrease when oxygen runs out - NoOxygenHealthDown
Display game web links - help
Toggle show AI - showai
Invincibility - rasputin
All eight weapons - xylophone
100,000 ammo for each weapon - fodder
Maximum health - quack
Set bullet time remaining to maximum - coke
Display game version - AlphaPrimeVersion