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• Achievements

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

Unlockable - How to Unlock

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.

• Bookmark or Share Assault Heroes

Bookmark or Share Assault Heroes on Xbox 360