Here is the full list of all 8 Pretty Girls Mahjong Solitaire achievements. It takes around 5-6 hours to unlock all of the achievements on Windows.
Clear all stages of five characters.
Clear all stages of AYAME.
Clear all stages of ERINA.
Clear all stages of KANON.
Clear all stages of RISA.
Clear all stages of RIN.
Cleared RIN Stage1.
First game play.