Enter one of the following cheat codes during game play to activate the corresponding cheat function. Enabling a code will prevent your score from being recorded to the leaderboard and prevent bonuses from being unlocked for your current session. Using any cheat will unlock the secret "Cheat Like It's 1994" achievement on Steam.
- Suicide - "iddqd"
- Lose all weapons - "idkfa"
- God mode - "quicken"
- Free level up "shazam"
- All weapons, ammo, and portal key - "rambo"