There are 12 achievements worth a total of 200 points
Kill more than 85% of the total enemies in a zone.
Complete the game.
Defeat the giant spider.
Complete all underground zones.
Finish a zone killing less than 50% of the enemies.
Don't waste more than 30% of your bullets.
Finish a zone without using grenades or nukes.
Finish a zone in less than 15 minutes.
Finish a zone killing 60% of the units on foot.
Max out all of the vehicle power-ups.
Finish a zone in Co-op mode.
Finish a zone without losing a life.
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