Complete the following tasks to unlock Apple Game Center achievements.

Achievement	How to unlock
Black Sheep Down	Complete all missions in Black Sheep Down.
Captain	Win 50 gold medals..
Close shear	Complete all missions in Operation Grass Snake.
Colonel	Win 80 gold medals.
Completionist	Complete all missions in chapter 8.
Country Savior	Complete mission 80.
Fearless	Complete a mission on hard level.
For the Motherland	Complete all missions in chapter 7.
Full Wool Jacket	Complete all missions in Operation Full Wool Jacket.
Gifted	Complete 20 missions without using "retry".
Lieutenant	Win 20 gold medals..
Mr. Wooler	Save several sheep during a hard mission..
Revenge of the Sh...	Complete all missions in Operation Sheepwood.
Ruthless	Complete a "wolf infiltrated" mission on hard level..
Sheep Counter	Achieve an overall score of at least 75000 points.
Starsheep Troopers	Complete all missions in Starsheep Troopers.
The saga... begins	Complete all missions on Operation Sheeplord.
Veteran of D-Day	Complete all missions in Omaa Beach.