Invincible
Complete a Co-op Arena Map on Crushing Difficulty without losing a single life
9/1/2012
5:05:15 AM
Ultra Rare 0.2%
Immortal
Complete a Co-op Arena Map on Hard Difficulty without losing a single life
8/31/2012
11:26:11 AM
Ultra Rare 0.4%
I Mastered that One
You have completed all of one character's Challenges!
8/26/2012
5:51:41 AM
Ultra Rare 4.4%
