| Unlockable: | How to Unlock: |
| CLEAN SLATE (5) | Kill all monsters in level on 'Hurt Me Plenty' or higher. |
| DESTROYER (10) | Get 100 kills on Xbox Live. |
| EPISODE FOUR (25) | Complete Episode 4 on 'Hurt Me Plenty' or higher. |
| EPISODE ONE (25) | Complete Episode 1 on 'Hurt Me Plenty' or higher. |
| EPISODE THREE (25) | Complete Episode 3 on 'Hurt Me Plenty' or higher. |
| EPISODE TWO (25) | Complete Episode 2 on 'Hurt Me Plenty' or higher. |
| HOARDER (5) | Find all items in level. |
| NEOPHYTE (20) | Complete any level. |
| NIGHTMARE (10) | Win a Nightmare level in single player. |
| RAMPAGE (35) | Complete all levels on UltraViolent mode. |
| ROOKIE (10) | Get 50 kills on Xbox Live. |
| SCOUT (5) | Find a secret area of a map. |
