Complete the following tasks to unlock Apple Game Center achievements.

Achievement	How to unlock
Brigadier General (25 points)	Brigadier General.
Captain (20 points)	Captain.
Chief Warrant Officer (20 points)	Chief Warrant Officer.
Chief Warrant Officer 2 (20 points)	Chief Warrant Officer 2.
Chief Warrant Officer 3 (20 points)	Chief Warrant Officer 3.
Chief Warrant Officer 4 (20 points)	Chief Warrant Officer 4.
Colonel (25 points)	Colonel.
Command Sergeant (15 points)	Command Sergeant.
Corporal (10 points)	Corporal.
First Lieutenant (20 points)	First Lieutenant.
First Sergeant (15 points)	First Sergeant.
General (25 points)	General.
General of the Army (50 points)	General of the Army.
Lieutenant Colonel (25 points)	Lieutenant Colonel.
Lieutenant General (25 points)	Lieutenant General.
Major (25 points)	Major.
Major General (25 points)	Major General.
Master Sergeant (15 points)	Master Sergeant.
Operation: Blizzard (25 points)	Fight your enemies on the dessert. Forecast: Blizzard.
Operation: Sand Storm (25 points)	Fight your enemies on the dessert. Forecast: Sandstorm.
Private (5 points)	Private.
Private 2 (5 points)	Private 2.
Private First Class (5 points)	Private First Class.
Second Lieutenant (20 points)	Second Lieutenant.
Sergeant (10 points)	Sergeant.
Sergeant First Class (10 points)	Sergeant First Class.
Sergeant Major (15 points)	Sergeant Major.
Sergeant Major of the Army (15 points)	Sergeant Major of the Army.
Specialist (5 points)	Specialist.
Staff Sergeant (10 points)	Staff Sergeant.
Turret: AK 47 (15 points)	Kill your enemies faster. Get the AK47 Turret Attachment.
Turret: Flame Thrower (15 points)	Burn them!.
Turret: Machine Gun (15 points)	Spray your enemies!.
Turret: Missile Launcher (15 points)	Target lock your enemies. Destroy all enemies aircrafts.
Turret: Shotgun (15 points)	A Powerful Weapon.
Warrant Officer (20 points)	Warrant Officer.