Exploding Fist
Kill 3 burster aliens with one melee attack (in single player).
3/16/2010
4:01:57 PM
Rare 43.1%
Sunny Side Up?
Kill an alien egg using the melee attack (in single player).
3/16/2010
7:08:51 AM
Rare 46.5%
Hardcore
Complete any single player level using only the Blaster and Grenades.
3/15/2010
10:15:44 PM
Rare 26.4%
Doctor in the House
Heal yourself for 200 hit points using health kits.
3/15/2010
9:39:03 AM
Common 50.4%
Can't Get Enough
Complete the prologue, all single player, co-op assault and survivor maps on any difficulty.
3/14/2010
7:36:23 PM
Rare 23.9%
Lazy
In a multiplayer game, reach the end of a level without dying or firing a shot.
3/14/2010
1:35:15 PM
Rare 20.4%
Survivors
Achieve a time of 8 minutes or better on any multiplayer survivor map.
3/14/2010
10:43:17 AM
Rare 26.8%
Hoovering up
In a multiplayer game, acquire 80% of all items, ammo, weapons and cash in one level.
3/14/2010
3:33:21 AM
Rare 20.8%
The Initiated
Complete the prologue in single player on any difficulty level.
3/13/2010
4:57:03 PM
Rare 29.3%
At Your Mercy
Kill a stunned alien with a Frag Grenade (in single player).
3/13/2010
8:03:56 AM
Rare 32.4%
Ultimate Boom Stick
Purchase the Damage upgrade for the Rocket Launcher.
3/12/2010
9:27:38 PM
Rare 25.1%
