ワルプルギス 円環の迷宮/ Walpurgis: Enkan no Meikyuu

This game is an exploration-type action game in which the player controls Sayaka Miki to explore a labyrinth. The player controls Sayaka Miki, who has lost her memory, and explores a labyrinth filled with mystery.

It is in the depths of a comatose labyrinth--. ......Sayaka-chan, Sayaka-chan...... I thought I heard someone calling me. Consciousness slowly rises from the depths of sleep, and Sayaka Miki's thoughts are lit. The voice belonged to a very important and treasured friend.