Here is the full list of all 15 Pretty Girls Klondike Solitaire achievements.
Cleared Easy mode.
Cleared Hard mode.
Completed all EPHELIA costumes.
Completed All costumes.
Completed all AOI costumes.
Completed all TSUBAKI costumes.
Completed all HONOKA costumes.
Completed all SENA costumes.
Completed all SHIORI costumes.
Completed all SERIKA costumes.
Completed all NAGISA costumes.
Completed all MAYU costumes.
Cleared Normal mode.
Completed all AIRI costumes.
Played a first game of Solitaire.