Use any special attack 100 times.
Kill 1000 Manbirds.
Kill 5000 Demons.
Resuscitate 50 allies.
Collect all the projectiles.
Complete all levels without using special attacks
Complete the game using any character.
Complete the game in an Xbox LIVE multiplayer session.
Kill 300 Zombies.
Locate and collect all of the Demon Babies.
Rack up a 20 score multiplier.
Defeat 50 enemies in a row without getting hit.