Three-some
Kill at least 3 enemies with a single shot from a grenade launcher in Single Player or Special Ops.
1/9/2010
4:24:40 PM
Common 54.5%
Special Effects!
Turn the effects dial during every Effects Zone in any mix at any difficulty (not in the tutorial).
12/26/2009
2:49:31 AM
Common 72.5%
Shout Out
Complete any mix using a microphone or headset in a single player game.
12/26/2009
2:46:26 AM
Rare 15.1%
Multiplier Madness
Achieve an 8X multiplier during any mix (not in the tutorial).
12/26/2009
2:45:29 AM
Common 82.8%
Breaking And Entering
Gain access to Administration after it is locked down by the Joker
9/28/2009
1:40:54 AM
Common 59.7%
Gnarly!
Finish with Flair! Cross the finish line with no more than two wheels touching the ground.
9/16/2009
1:47:28 AM
Common 83.5%
Malpractice Needs More Practice
Survive the onslaught from the deformed Joker henchman
9/13/2009
3:00:15 PM
Common 87.1%