Sally Likes Blood
Demonstrate killer economic sensibilities by taking down 3 enemies with a single bullet.
12/16/2010
12:39:50 AM
Rare 34.9%
Lucifer's Accountant
Beat any song with a final score which is evenly divisible by 6 (Quickplay+)
12/13/2010
7:20:39 PM
Common 62.7%
Quick Learner
Full-Combo any tutorial exercise (no missed notes or overstrums)
12/10/2010
10:30:04 AM
Very Rare 8.9%
Easy Rhino
In Dead Ops Arcade, use a Speed Boost to blast through 20 or more enemies at one time.
11/22/2010
5:42:05 PM
Ultra Rare 1.3%