What Does This Button Do??
Complete Arcade Ladder without blocking (allowed to continue)
5/7/2011
1:44:16 PM
Rare 10.7%
Shock Therapy
Impale an enemy with the Javelin Gun and use its Alt-Fire to shock 3 others (single player only)
4/26/2011
5:18:31 PM
Rare 17.5%
My Boom Stick
Kill 6 enemies at once with Line Gun's Alt-Fire (single player only)
4/26/2011
2:55:30 PM
Rare 10.3%
Vacuum Cleaner
Decompress 20 Necromorphs without getting sucked out yourself
4/26/2011
1:39:55 PM
Very Rare 6.9%
Epic Dismemberment
Dismember 2,500 Necromorph Limbs (single player only)
4/25/2011
7:47:23 PM
Rare 13.8%
The Sampler Platter
Kill a Necromorph with every Weapon in the game (single player only).
4/25/2011
6:20:02 PM
Very Rare 8.7%
