Arcade Rat
Clear Arcade Mode with 1 character on Medium or higher difficulty.
2/18/2009
1:51:24 AM
Rare 21.2%
Specter Recon
Collect 50 pieces of gray tech in the Cooperative campaign.
2/1/2009
5:41:18 AM
Rare 15.6%
Pyromaniac
Set 100 enemies on fire with the Bellock, air fuel grenade, spider grenade, or environmental hazard in the single player Campaign.
12/22/2008
10:41:18 PM
Very Rare 6.4%