Unlockable - Achievements |
| Pipe Wielder (5) | Wield the pipe in single-player or co-op mode. |
| Knife Wielder (5) | Wield the knife in single player or co-op mode. |
| Psycho (15) | Kill 10 enemies without losing your weapon. |
| Perfect Boss (10) | Beat the first boss without dying. |
| Fourth Boss (10) | Beat the fourth boss. |
| First Versus (10) | Beat another player on Xbox Live in a versus match. |
| Online Warrior (5) | Beat 10 opponents on Xbox Live in versus mode. |
| Online Co-op (10) | Complete an online co-op game. |
| High Score (25) | Score 800,000 points in one game -- with Game Settings set to Hardcore. |
| Kill Jet (30) | Defeat Boss 'Jet' at the end of Stage 2 -- with Game Settings set to Hardcore. |
| Hard Win (35) | Beat the game without using a special attack. |
| Perfect Win (40) | Beat the game without continuing. |
