Kill 500 zombies.

Pick up 1,000 zombie medals.

Buy a combo at Chop2Shop.Zom and use it.

Peeped under Juliet's skirt once.

Take your first photograph.

Obtain the "Brain Tonic" Gore Tool from Shogai

Upgrade your bike for the first time

Upgrade either your Health, Stamina, or Focus for the first time

Leaped through the ring in Bubbling Under.

Broke up a Bot Wall.

Danced with 100 Bots in Crash Site.

Busted a move with an iconic marsupial in Crash Site.