Nightfall Completionist
Complete all challenges and kill the Breeder in Nightfall in Regular or Hardcore difficulty.
5/17/2010
8:11:49 PM
Ultra Rare 0.3%
Skilled Negotiator
Complete the Special Ops mission "Negotiator" on Veteran difficulty.
5/4/2010
8:20:47 AM
Ultra Rare 0.2%
Party Crasher
Kill 20 enemies with the Grappling Hook in "Sentinel."
4/24/2010
4:42:27 PM
Ultra Rare 0.6%
Postman
Deliver 100 flags in Capture the Flag or other battle matches.
4/18/2010
8:57:15 PM
Ultra Rare 0.3%
Polyarmory
In Diner Turned, get a kill with each primary weapon in a Public Match.
4/7/2010
6:22:31 AM
Ultra Rare 0.8%
Sally Likes Blood
Demonstrate killer economic sensibilities by taking down 3 enemies with a single bullet.
3/9/2010
12:30:50 AM
Rare 34.9%
Renewable Energy
Smelt Wood Trunks using Charcoal to make more Charcoal.
2/17/2010
6:18:09 AM
Very Rare 7.3%
Unconventional Warfare
Use the explosive bolts to kill 30 enemies in the campaign.
1/29/2010
3:03:22 AM
Very Rare 8.9%