No Backups
Complete the glass house maze without going back up the stairs.
7/27/2011
6:49:02 PM
Rare 36.5%
Hardcore
Complete any single player level using only the Blaster and Grenades.
7/27/2011
12:01:57 AM
Rare 26.4%
The Initiated
Complete the prologue in single player on any difficulty level.
7/27/2011
12:01:51 AM
Rare 29.3%
Exploding Fist
Kill 3 burster aliens with one melee attack (in single player).
7/26/2011
11:36:17 PM
Rare 43.1%
Sunny Side Up?
Kill an alien egg using the melee attack (in single player).
7/26/2011
11:28:10 PM
Rare 46.5%
Vital Statistics
Finish ‘Primed’ single player level with 300000 or more overall score.
7/26/2011
1:39:47 AM
Rare 36.7%
Ultimate Boom Stick
Purchase the Damage upgrade for the Rocket Launcher.
7/26/2011
1:30:41 AM
Rare 25.1%
Doctor in the House
Heal yourself for 200 hit points using health kits.
7/25/2011
7:17:26 PM
Common 50.4%
Pathfinder
Complete a single player level with Waypoint Display turned off.
7/24/2011
12:08:02 AM
Rare 25.5%
