Complete the following tasks to unlock Apple Game Center achievements.

Achievement	How to unlock
Block CPU	Gears: prevent the computer from saving blue Marblenauts in a single game.
Cave 2000	Dark Cave: earn a score of 2000 or more points.
Complex Mode 100%	Complete everything in Complex Mode.
Cross Slice	Match Three: activate a horizontal and vertical slice simultaneously using the same Marblenaut.
Gears 1000	Gears: score 1000 points or more against the computer.
Horizontal Slice	Match Three: remove a horizontal line using a Marblenaut with sunglasses.
Long Combo	Match Three: activate a chain reaction of Marblenaut combinations without breaking rocks.
Lucky Star	Tilt Madness: collect a star immediately after it appears.
Massive Cleanup	Match Three: clean up a huge amount of Marblenauts simultaneously.
Match 4000	Match Three: earn a score of 4000 or more points.
No Mistake	Dark Cave: complete three puzzles without using Undo.
Out Of Jail	Behind Bars: Dave every Marblenaut.
Rolling To The Stars	Tilt Madness: don't let more than 4 stars appear.
Secret Area Found	Collect enough stardust to find the Secret Area.
Simple Mode 100%	Complete all levels in Simple Mode.
The Great Escape	Complete the spaceship and help your Marblenauts escape in Complex Mode.
The Perfect Solution	Multiball: Save all Marblenauts.
Tilt 5000	Tilt Madness: earn a score of 5000 or more points in one game.
Unlock Treasure	Get the silver key and unlock the treasure chest in Simple Mode.
Vertical Slice	Match Three: remove a vertical line using a Marblenaut with sunglasses.