Here is the full list of all 16 All Zombies Must Die: Scorepocalypse achievements.
Achieve a Silver Medal on Town Square
Achieve a Bronze Medal on Town Square
Achieve a Gold Medal on Town Square
Beat the developer at their own game on Town Square!
Achieve a Bronze Medal on Mall
Achieve a Silver Medal on Mall
Beat the developer at their own game on Mall!
Achieve a Gold Medal on Mall
Achieve a Bronze Medal on Suburbia
Achieve a Silver Medal on Suburbia
Achieve a Gold Medal on Suburbia
Beat the developer at their own game on Suburbia!
Achieve a Bronze Medal on Graveyard
Achieve a Silver Medal on Graveyard
Achieve a Gold Medal on Graveyard
Beat the developer at their own game on Graveyard!