Complete the following tasks to unlock Vita trophy rewards.

Trophy	How to unlock	Type
Crasher	Explode at least 100 containers in one session.	Silver
Dongerino	Kill first Undead Boss.	Silver
Exterminator (secret)	Kill 500.000 zombies.	Silver
Level Up (secret)	Rack up to 30 level.	Silver
Lock'n'Load (secret)	Kill at least 1.000 zombies with each weapon type.	Silver
Melee Master (secret)	Use melee attack 100 times in one session.	Bronze
Pacifist	Don't shoot for whole six minutes and survive.	Silver
RAMPAGE!	Perform a rampage attack.	Bronze
Stay Alive	Stay alive at least 60 minutes.	Gold
XP+	Get 10.000.000 experience points in the single session.	Silver