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