Here is the full list of all 22 Mastermine achievements.
Solve your first Beginner cube
Solve your first Advanced cube
Solve cubes for a total of 10 minutes
Solve 2 cubes in Time Crisis
Use 20 Burst clears
Use 10 Lightning powerups
Solve 3 cubes using the Memory skin
Solve 9 cubes with the Retro skin
Solve your first Expert cube
Solve a cube without using flags
Solve a cube flagless using the Memory skin
Solve 3 cubes in a row, each in under a minute
Solve a cube in less than 30 seconds
Solve a cube harder than Expert (16x16+)
Solve 100 cubes in Light theme
Solve 100 cubes in Dark theme
Solve cubes for a total of 5 hours
Solve all difficulties in a row without blowing up
Solve 500 cubes total
Spend 1,000,000 credits in the store
Reach Campaign level 15
Reach Campaign level 30