Wield the pipe in single-player or co-op mode.

(1)  

Wield the knife in single player or co-op mode.

  

Kill 10 enemies without losing your weapon.

  

Beat the first boss without dying.

  

Beat the fourth boss.

  

Beat another player on Xbox Live in a versus match.

Beat 10 opponents on Xbox Live in versus mode.

Complete an online co-op game.

(33) 

Score 800,000 points in one game -- with Game Settings set to Hardcore.

(13)  

Defeat Boss 'Jet' at the end of Stage 2 -- with Game Settings set to Hardcore.

(3)  

Beat the game without using a special attack.

(3)  

Beat the game without continuing.

(2)