Complete the following tasks to unlock Vita trophy rewards.

Trophy	How to unlock
Deja Vu (Bronze)	Find your own grave.
Don, Bill & Paul's Curse (Bronze)	Someone died of dysentery.
Fat Cat (Bronze)	Have $1000 on you.
Fording Master (Bronze)	Successfully forde a horde of zombies 3 times.
I Can't Do It (Bronze)	Don't pull the trigger.
I Know A Guy (Bronze)	Make it to Safe Haven with someone named Romero in your party.
Life On The Other Side (Bronze)	Become a zombie.
Make The Call (Silver)	Put down an infected party member who has passed out.
Marathon (Silver)	Beat the game five times.
Pimp Your Ride (Bronze)	Fully upgrade your station wagon.
Silver Bullet (Bronze)	Kill 25 zombies without missing a shot.
True Survivor (Gold)	Beat the game on hard.
Zombicide (Silver)	Kill 500 zombies.