Trophies:
Bronze trophies
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 trophies
Sharp Shooter – Maintain an 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 trophy
Assault Hero – Beat the game.