Here is the full list of all 12 Crackdown 3: Wrecking Zone achievements worth 500 gamerscore.
Got a kill with every weapon in a single match
Won 20 matches
Completed a match without dying
Captured 100 Territories
Secured 100 badges in Agent Hunter
Reached 100 kills
Got a melee kill
Dealt a large amount of damage to buildings in a single match
Got MVP (Highest Score on Winning Team) in Agent Hunter
Got MVP (Highest Score on Winning Team) in Territories
Killed an entire team in a single match
Won a match