Kill 100 zombies

Kill 200 zombies

Kill 500 zombies

Kill 150 Mafiosi

Kill 200 German soldiers

Kill 75 enemies with headshots

Destroy 15 vehicles

Eat 50 cannoli

Kill 5 ball-and-chain zombies in mid air

Kill 100 enemies with the chainsaw

Have 20 enemies killed by propelling airvents in the 'Secret Base' level

Simultaneously kill 5 enemies with the rocket launcher

Consecutively kill 20 units with headshots

Survive the Raid using only the baseball bat

Finish the Thugtown level, using only the pistol

Kill a German soldier by dropping the churchbell on top of him in the 'Killing Fields' level