Perfect Win
You beat the game without continuing.
40 ✓ January 26th, 2008
Psycho
You killed 10 enemies without losing your weapon.
15 ✓ January 23rd, 2008
Perfect Boss
You beat the first boss without dying.
10 ✓ January 23rd, 2008
Fourth Boss
You beat the fourth boss.
10 ✓ January 23rd, 2008
First Versus
You won an online versus match.
10 ✓ May 27th, 2009
Online Co-op
You completed an online co-op game.
10 ✓ May 27th, 2009
Pipe Wielder
You wielded the pipe in single-player or co-op mode.
5 ✓ January 23rd, 2008
Knife Wielder
You wielded the knife in single-player or co-op mode.
5 ✓ January 23rd, 2008
Hard Win
You beat the game without using a special attack.
35 
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 Warrior
You have defeated 10 opponents on Xbox Live in versus mode.
5