Saving Private Sheep HD [iPhone]

Game Center achievements
Complete the following tasks to unlock Apple Game Center achievements.
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