Game Center achievements|
Complete the following tasks to unlock Apple Game Center achievements.
3×50 (30 points): In any single level, purge at least 150 enemies, killing a minimum of 50 with each weapon type.
Aint No Rookie (10 points): Complete the boot-camp without taking damage.
All Hail The G Man (50 points): Complete 40 pages of endurance in hard mode.
Army Of One (50 points): Kill 10,000 martians.
Boom Boom (30 points): Use a launcher weapon to kill 10 martians in a single blast.
Completist (40 points): Complete the game in all three difficulty settings.
Crispy (10 points): Purchase the lightning gun.
Fully Loaded (40 points): Get 2000 rounds of ammo into your minigun.
Getting Started (10 points): Kill 1,500 martians.
Gifted (10 points): Complete 10 pages of endurance in easy mode.
Hat Trick (30 points): Upgrade all three weapon-types in a single visit to a vending machine.
High Flier (20 points): Collect all meteor rocks in a chapter.
Home Coming (20 points): Complete the army-base chapter.
Ka-boom (10 points): Purchase the plasma launcher.
Martian Purger (30 points): Kill 5,000 martians.
Mean Streets (30 points): Complete the city chapter.
No Sweat (20 points): Complete 20 pages of endurance in normal mode.
Pacifist (30 points): Complete a level without firing a weapon or receiving any damage.
Rooted (40 points): In story mode, city chapter, defend one spot turning left and right, but don’t move for 2 mins.
Rush-a-holic (40 points): Grab all rush crates in story mode.
Space Marine (10 points): Complete the Moon chapter.
Super Market Sweep (40 points): Buy all available items in a single visit to a vending machine.
Sustain (30 points): Purge 50 enemies in a single beam-attack (one press of the fire button points).
To The Teeth (30 points): Purchase all weapons.
Vending Machine Ping Pong (30 points): In story mode, army-base chapter, access both vending machines, alternating between them 5 times.
Yeah Baby (10 points): Purchase the minigun.