This week we've updated the Arena Feature in BattleBlock Theater and there's another return unlock in rotation. For XBLA players, you'll be able to unlock Scuba Steve when you head to an online area of the game. For Steam players, you can unlock Behemoth Chicken when you head to an online area of the game.
my_playlist by Lightningflam31 (XBLA)
BattleBall by Le Bootiful Face (Steam)