Perfect Win
You beat the game without continuing.
40 ✓ September 2nd, 2010
Hard Win
You beat the game without using a special attack.
35 ✓ September 2nd, 2010
Psycho
You killed 10 enemies without losing your weapon.
15 ✓ September 2nd, 2010
Perfect Boss
You beat the first boss without dying.
10 ✓ September 2nd, 2010
Fourth Boss
You beat the fourth boss.
10 ✓ September 2nd, 2010
Pipe Wielder
You wielded the pipe in single-player or co-op mode.
5 ✓ September 2nd, 2010
Knife Wielder
You wielded the knife in single-player or co-op mode.
5 ✓ September 2nd, 2010
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 
First Versus
You won an online versus match.
10 
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