Bunch of Heroes achievements

Protect 50 cheerleaders

Kill the Martian King

Check out the Credits

Complete a multiplayer mission without damaging any allies

While in survival mode and playing alone: get to wave 3 without having been damaged

Complete 1 mission without picking up any Ultra Charges

Eliminate 1,000 Zombie Chickens

Complete a mission without picking up any weapons

Eliminate 1,000 Radioactive Zombies

Defeat Fatzi

Eliminate 200 zombies with melee attacks

Eliminate 1,000 Zombie Evaders