Assault Heroes - Platform: XBox 360

Achievements:
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Complete the task to unlock the following achievements and their alloted gamerscore.

Unlockable               How to Unlock
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Annihilator (10)       - Kill more than 85% of the total enemies in a zone. 
Assault Hero (30)      - Complete the game. 
Exterminator (10)      - Defeat the giant spider. 
Lair Slayer (10)       - Complete all underground zones. 
Peace Maker (20)       - Finish a zone killing less than 50% of the enemies. 
Sharp Shooter (10)     - Don't waste more than 30% of your bullets. 
Small Arms Expert (20) - Finish a zone without using grenades or nukes. 
Speed Freak (20)       - Finish a zone in less than 15 minutes. 
Survivor (20)          - Finish a zone killing 60% of the units on foot. 
Tricked Out (20)       - Max out all of the vehicle power-ups. 
Twin Medal (20)        - Finish a zone in Co-op mode. 
Unstoppable (10)       - Finish a zone without losing a life.