Complete the following tasks to unlock Apple Game Center achievements.

Achievement	How to unlock
A+ Student	Complete the tutorial.
All Too Easy	Complete 5 easy levels.
Archibishop	Upgraded a Bishopto Rank MAX.
Emperor	Upgraded a King to Rank MAX.
Empress	Upgraded a Queen to Rank MAX.
Flawless	Win without any enemies exploding into your pieces.
Fortress	Upgraded a Rook to Rank MAX.
Grapeshot	Scored a 10-hit combo.
I Punched Evil in the...	Complete the "Big Badda Boom" level.
I'm Hardore	Complete 5 hard levels.
Just Right	Complete 5 medium levels.
Line 'em up	Scored a 5-hit combo.
Power Overwhelming	Scored a 20-hit combo.
Run Around	Win without upgrading any pieces.
Tank	Have a piece at a defense level of 7 or higher.
Templar	Upgraded a Knight to Rank MAX.
Thick Skull	Win by having all enemies explode into your pieces.
Trooper	Upgraded a Pawn to Rank MAX.