Here is the full list of all 27 GemBreak achievements.
Get help from the UFO 50 Times
Get 150.000 points
Hit 6 Red Gems with Buzz Saw
Ball got stuck in space
Unlocks when you complete lvl 90
Hit 5 Red Gems with the Acid Ball
Get 100.000 points
Unlocks when Solar Storm has been called upon 50 Times
Bounce 100 times in one playthrough
Unlocks when you complete lvl 50
Hit 12 Red Gems on a level
Unlocks when you have used Meteor Shower 20 times
Enter 10 black holes!
Slide or hit 100 Speedbricks!
Get 50.000 points
Unlocks when you have hit 1000 Round Blue Bricks
Unlocked when a big ball goes fire
Get 25.000 points
Unlocked when a big ball goes acid
Hit 500 blue square bricks
Hit 5 Bonus Bricks with a single Ball!
Hit 50 Green Bonus Bricks!
Hit 100 Red Gems!
Starting the space journey by completing level 10
Unlocked when you have died 50 times
Bounce the ball 8 times with the Breakout Bouncer
Unlock when completing the first level