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Post edited 8:28 pm – January 31, 2010 by Zuler

Bronze

Exterminator
Defeat the giant spider.

Unstoppable
Finish a zone without losing a life.

Annihilator 
Kill more than 85% of the total enemies in a zone.

Small Arms Expert
Finish a zone without using grenades or nukes.

Twin Medal
Finish a zone in Co-op mode.

Speed Freak
Finish a zone in less than 15 minutes.

Tricked Out
Max out all of the vehicle power-ups.

Silver

Sharp Shooter
Keep your accuracy higher than 70%.

Lair Slayer
Complete all underground zones without using a continue.

Peace Maker
Finish a zone killing less than 50% of the enemies.

Survivor
Finish a zone killing 60% of the units on foot.  

Gold

Assault Hero
Complete the game

Source – http://www.ps3trophies.co.uk/s…..hp?t=46595