i cant seem to work the generator, so ill post my ideas here:
Midget Malformation - Kill a charger by only shooting on its small arm.
Douchebagness - kill 3 survivors with 1 molotov on Expert.
I Wish I Had A Crowbar - kill a tank using the axe.
Cooking Mama - kill the witch with a frying pan.
Portal´s Plot got Owned - find a cake.
and the best of them all, gives 400g on the 360:
FALCON PAWNCH! - Kill a witch, a smoker, a hunter, a boomer and all four survivors as a tank without using rocks in a single life. YES!