Get all other trophies
Buy the Shotgun gun.
Defeat the Horned Boss.
Buy the Plasma Pistol gun.
Kill a Shredder enemy.
Unlock the Punk hero.
Kill a Bomber enemy.
Kill a Track Shooter enemy.
Kill a Hopper enemy.
Kill a Red Horned enemy.
Defeat the Turtle Boss.
Unlock the Princess heroine.
Unlock the Pirate hero.
Unlock the Ninja hero.
Unlock the Mime hero.
Buy the SMG gun.
Unlock the Hippie hero.
Kill a BrainWorm enemy.
Unlock the General hero.
Kill a Zombie Turtle enemy.
Kill a Worm enemy.
Defeat the Muscled Boss.
Buy the TwinShot gun.
Unlock the Dino hero.
Unlock the Professor hero.
Unlock the Hobo hero.
Unlock the Agent hero.
Unlock the Trucker hero.
Find a Crystal Skull.
Unlock the Lunatic hero.
Kill a Zombie Runner enemy.
Buy the Magnum gun.
Kill a Flyer enemy.
Unlock the Gentleman hero.
Kill a Zombie Shooter enemy.
Unlock the Cop hero.
Kill a Zombie enemy.