Perfect Win
You beat the game without continuing.
40 ✓ July 16th, 2008
Hard Win
You beat the game without using a special attack.
35 ✓ July 29th, 2008
Psycho
You killed 10 enemies without losing your weapon.
15 ✓ July 28th, 2008
Perfect Boss
You beat the first boss without dying.
10 ✓ July 16th, 2008
Fourth Boss
You beat the fourth boss.
10 ✓ July 12th, 2008
First Versus
You won an online versus match.
10 ✓ July 30th, 2008
Pipe Wielder
You wielded the pipe in single-player or co-op mode.
5 ✓ July 12th, 2008
Knife Wielder
You wielded the knife in single-player or co-op mode.
5 ✓ July 12th, 2008
Kill Jet
You defeated Jet and reached Stage 3 -- with Game Settings set to Hardcore.
30 
High Score
You scored 800,000 points with Game Settings set to Hardcore.
25 
Online Co-op
You completed an online co-op game.
10 
Online Warrior
You have defeated 10 opponents on Xbox Live in versus mode.
5