Sharpshooter
Get 30 headshots while scoped in with the Fareye or Marksman in the single player Campaign.
9/30/2009
10:05:58 PM
Rare 31.1%
I See You
Kill 50 enemies through solid matter with the Auger in the single player Campaign.
9/30/2009
9:40:20 PM
Rare 37.4%
Nowhere to Hide
Tag and kill 30 enemies with the Bullseye secondary fire in the single player Campaign.
9/30/2009
9:19:10 PM
Rare 15.4%
Acquire Waffle Weapons!
Obtain the Ray Gun, DG-2, and the Monkey Bomb at the same time in a game. (Map Pack 3 only)
8/17/2009
11:54:21 PM
Very Rare 5.6%
Der Electrician!
Link all teleport pads before round 7. (Map Pack 3 only)
8/11/2009
9:31:37 PM
Very Rare 7.6%
We Came, We Saw…
Complete the game on 'Casual' or 'Experienced' difficulty.
7/29/2009
1:31:53 AM
Rare 30.9%
Disaster of Biblical Proportions
Complete the 'Central Park Cemetery' level.
7/29/2009
1:31:47 AM
Rare 30.9%
Let Me Guess, Gozer Worshippers
Complete the 'Lost Island Rising' level.
7/29/2009
12:01:04 AM
Rare 35.4%
Big Brawler
Get 10 consecutive zombie melee kills before Insta-Kill expires. (Map Pack 2 only)
7/27/2009
1:12:34 AM
Ultra Rare 3.5%
Somebody Saw a Cockroach on 12
Complete the 'Return to the Sedgewick' level.
7/26/2009
6:38:52 PM
Rare 40.5%
I Don't Want My Face Burned Off
Purchase all upgrades for the Meson Collider.
7/26/2009
6:03:31 PM
Rare 33.4%
Ghost Fever Grips New York
Complete the 'Museum of (Super)Natural History' level.
7/26/2009
5:48:02 PM
Rare 43.2%
We be fast! They be slow!
Purchase all upgrades for the Dark Matter Generator.
7/26/2009
5:31:09 PM
Rare 34.5%