Against All Odds
Finished the game on the hardest difficulty level.
4/23/2013
2:15:09 AM
Ultra Rare 4.2%
Aqua Incognita
Play at least one non-private match on each DLC map.
4/19/2013
2:11:24 AM
Ultra Rare 0.5%
Professor Portal
After completing co-op, complete Calibration Course online with a friend who hasn’t played before
4/9/2013
11:57:03 PM
Ultra Rare 1.7%