Complete the following tasks to unlock Apple Game Center achievements.

Achievement	How to unlock
Completed All Missions On Easy	Complete all missions in Easy Difficulty.
Completed All Missions on Hard	Complete all missions in Hard Difficulty.
Completed All Missions on Normal	Complete all missions in Normal Difficulty.
Crystal Miner	Collect 500 Crystal Cubes.
Directional Gun Master	Get to Directional Gun Master Level 5.
Gold Miner	Collect 250 Gold Cubes.
Invincible on Hard	Complete all missions in Hard Difficulty without dying once.
Laser Gun Master	Get to Laser Gun Master Level 5.
Machine Gun Master	Get to Machine Gun Master Level 5.
Super Hero On Easy	Achieve Super Hero Status in Easy Difficulty.
Super Hero On Hard	Achieve Super Hero Status on Hard Difficulty.
Super Hero On Normal	Achieve Super Hero Status on Normal Difficulty.