Special Effects!
Turn the effects dial during every Effects Zone in any mix at any difficulty (not in the tutorial).
12/25/2009
8:06:30 PM
Common 72.5%
Multiplier Madness
Achieve an 8X multiplier during any mix (not in the tutorial).
12/25/2009
8:05:59 PM
Common 82.8%
Malpractice Needs More Practice
Survive the onslaught from the deformed Joker henchman
12/25/2009
2:34:30 PM
Common 87.1%
Leave No Man Behind
Rescue the guards and henchman from the Joker toxin in Decontamination
12/25/2009
2:31:05 PM
Common 84.0%
Three-some
Kill at least 3 enemies with a single shot from a grenade launcher in Single Player or Special Ops.
12/25/2009
1:34:08 PM
Common 54.5%