Here is the full list of all 10 Mahjong achievements. It takes around 8-10 hours to unlock all of the achievements on Windows.
Clear 70 Levels
Clear 60 Levels
Clear 50 Levels
Clear 40 Levels
Clear 30 Levels
Clear 20 Levels
Clear 15 Levels
Clear 10 Levels
Clear 5 Levels
Clear 1 Level