Kill 100 zombies
Kill 1,000 zombies
Kill 5,000 zombies
Kill 100,000 zombies
Kill 25,000 zombies
Kill 1,000 zombies with pistols
Kill 1,000 zombies with shotguns
Kill 1,000 zombies with assault rifles
Kill 1,000 zombies with SMGs
Kill 1,000 zombies with rifles
Destroy 10 barrels
Destroy 100 barrels
Destroy 50 barrels