Cheat mode
Enter one of the following codes during game play to activate the corresponding cheat function.
| Invincibility | iddqd |
| All weapons, keys, ammo, and 200% armor | idkfa |
| All weapons, full ammo, 200% armor | idfa |
| Berserker strength | idbeholds |
| Temporary invincibility | idbeholdv |
| Temporary invisibility | idbeholdi |
| Full automap | idbeholda |
| Anti-radiation suit | idbeholdr |
| Light amplification visor | idbeholdl |
| Walk through walls | idspispopd |
| Chainsaw | idchoppers |
| Level select | idclev<episode number><map number> |
| Toggle full map; full map and objects; normal map | iddt |
| Display coordinates and heading | idmypos |
| Change music to indicated level | idmus<level number> |