Complete the following tasks to unlock Vita trophy rewards.

Trophy	How to unlock
Babyface Barry (Bronze)	You finished World 2 (The 1930's).
Barry san (Bronze)	You finished World 4 (Japan).
Camper (Bronze)	You killed 20 zombies without moving.
Darwin Award (Bronze)	You Finished World 1 (Prehistoric).
Frag Out (Bronze)	You killed 10 Zombies with a single Grenade.
Immunity Idol (Silver)	Survive to Wave 15 on any Survival Mode map.
Mowing the Grass (Bronze)	You killed 50 Zombies with a Buzzsaw.
Mummies I'd like to frag (Bronze)	You finished World 3 (Egypt).
New Sheriff in Town (Bronze)	You finished World 6 (Western).
Peashooter (Bronze)	You finished a level by only firing the pistol.
SharpShooter (Bronze)	Get 75% or greater accuracy on any Chapter.
Supersized Combo (Bronze)	You earned a 100x or more combo from any weapon pickup.
To the future and back (Bronze)	You finished World 5 (Future).
Untouchable (Gold)	Finish the Story Mode in one sitting without having to use a continue!.
You are Barry Steakfries (Bronze)	Finish the game without dying once.