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