The Basics
Complete one of the missions you receive in the mission log.
11/8/2011
4:14:27 AM
Common 89.1%
Some Like it Hot
Kill 6 enemies in a row using a thermal weapon in Single Player or Special Ops.
10/27/2011
12:44:28 AM
Rare 39.8%
Mortal Kombat Champion
Finish Arcade Mode with a Mortal Kombat Character
9/24/2011
9:43:09 PM
Rare 24.4%
The Ultimate Evil
Complete Both Mortal Kombat and DC Universe Story Modes
9/13/2011
2:10:01 AM
Rare 20.3%
Ten plus foot-mobiles
Kill at least 10 enemies with one Predator missile in Single Player or Special Ops.
8/13/2011
4:02:17 AM
Rare 45.1%
Two Birds with One Stone
Kill 2 enemies with a single bullet in Single Player or Special Ops.
8/13/2011
3:10:05 AM
Common 57.6%