ACHIEVEMENT - HOW TO UNLOCK Ace Pilot - Complete all missions without continue. Big Shot - Hit 1,500 enemies down. Clean Up - Complete one mission with 95% of deaths. Destructor - Hit 4,000 enemies down. Hot Fire - Hit 500 enemies down. No Mercy - Hit 2,500 enemies down. Perfect Fly - Complete three missions with a single ship. Safe Fly - Complete one mission with a single ship. War Hero - Complete all missions. Zero Remain - Complete three missions with 95% of deaths.