Enter one of the following codes during game play:
| Code: | Result: |
| rdbeta | "Eat me!" message |
| rdhounddog | "Elvis is dead" message |
| rdrafael | "For your grandpa!" message |
| rdmaxx | "Maxx rules" message |
| rdteachers | "You were all wrong" message |
| rdguns | All guns |
| rdinventory | All inventory items |
| rditems | All items |
| rdkeys | All keys |
| rdall | All keys, ammo, health |
| rdfuckngo<episode number 1-2><map number 01-07> | Alternate level select |
| rdskill<skill number 1-4> | Change difficulty level |
| rdyerat | Display coordinates |
| rdrate | Display framerate |
| rdview | External view |
| rdmeadow<episode number 1-2><map number 01-07> | Level select |
| rdtime | Remove aiming feature on guns |
| rdjoseph | Ride a motorcycle |
| rdcluk | Shoot feathers |
| rdunlock | Toggle all locks |
| rdclip | Toggle clipping mode |
| rddebug | Toggle debug mode |
| rdshowmap | Toggle full map |
| rdelvis or rdhounddog | Toggle invincibility |
| rdmonsters | Toggle monsters |
| rdmoonshine | Toggle moonshine mode |
At the beginning of the Junkyard level, turn around 90 degrees to see one of the old men shooting at you from behind an impassable fence. Avoid shooting him for now, because he will get hit by a moving pickup truck. Enable the rdclip code and get through the fence. Watch for the truck. You will notice that it is the same wrecked pickup truck you would normally see if you followed the regular path through the level; face smeared across the windshield and all. This is not the only time you will run into this phantom. When playing in the J. Cluck's Poultry Plant level, you will see his truck parked in the parking lot, except the hand wedged in the door seems to have disappeared
