While playing the game, press [Esc] to return to the main menu. Then, repeatedly type "dougmatic" until the menu disappears. Press Esc to enable cheat mode. Now enter one of the following codes:
| Cheat Code | Result |
| giveme | All weapons |
| loadme | Unlimited ammo |
| healme | Full health |
| protectme | Invincibility |
| moveme | Saved games have all locations |
| killem | Kill everything on level |
agent | Switch agent | |