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