Achievements

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