Complete the following tasks to unlock PlayStation 3 trophy rewards.

Trophy	How to unlock
Annihilator ( Bronze )	Kill more than 85% of the total enemies in a zone.
Assault Hero ( Gold )	Complete the game.
Exterminator ( Bronze )	Defeat the giant spider.
Lair Slayer ( Silver )	Complete all underground zones without using a continue.
Peace Maker ( Silver )	Finish a zone killing less than 50% of the enemies.
Sharp Shooter ( Silver )	Keep your accuracy higher than 70%.
Small Arms Expert ( Bronze )	Finish a zone without using grenades or nukes.
Speed Freak ( Bronze )	Finish a zone in less than 15 minutes.
Survivor ( Silver )	Finish a zone killing 60% of the units on foot.
Tricked Out ( Bronze )	Max out all of the vehicle power-ups.
Twin Medal ( Bronze )	Finish a zone in Co-op mode.
Unstoppable ( Bronze )	Finish a zone without losing a life.