Driving Music
Use the Personal BGM function, and go for a drive while listening to your favorite songs.
3/3/2011
9:30:52 AM
Very Rare 6.7%
Clean Cut
Sever all three tentacles of a Lurker with one Line Gun Primary Fire shot (single player only)
2/28/2011
8:47:11 AM
Rare 21.7%
C-Section
Knock down an enemy with Contact Beam Alt-Fire then kill it with Primary Fire before it stands up
2/28/2011
8:35:20 AM
Rare 11.3%
Going for Distance
Impale an enemy and make him fly through the air for 17 meters - it must stick to the surface
2/28/2011
7:44:00 AM
Rare 30.7%
Shock Therapy
Impale an enemy with the Javelin Gun and use its Alt-Fire to shock 3 others (single player only)
2/28/2011
7:43:03 AM
Rare 17.5%
The Sampler Platter
Kill a Necromorph with every Weapon in the game (single player only).
2/27/2011
10:48:07 AM
Very Rare 8.7%
Frozen in Time
Kill 50 Necromorphs while they are in Stasis (single player only)
2/27/2011
10:46:32 AM
Rare 28.0%
Skewered in Space
Impale an enemy into a Decompression Window to cause it to blow out
2/27/2011
10:45:16 AM
Rare 11.0%
My Boom Stick
Kill 6 enemies at once with Line Gun's Alt-Fire (single player only)
2/27/2011
10:39:37 AM
Rare 10.3%
...And Stay Down
Kill 25 crawling enemies with Stomp (single player only)
2/27/2011
9:02:29 AM
Rare 14.5%
Epic Dismemberment
Dismember 2,500 Necromorph Limbs (single player only)
2/27/2011
8:41:52 AM
Rare 13.8%
Vacuum Cleaner
Decompress 20 Necromorphs without getting sucked out yourself
2/26/2011
10:46:28 AM
Very Rare 6.9%