Period: Cube ~Shackles of Amadeus~ is an otome visual novel video game originally released for the PlayStation Vita in 2016. In this immersive adventure, players navigate a young girl who is searching for her missing brother within the dangerous confines of an online game world. She must interact with a variety of characters, make critical decisions, and uncover the secrets of this virtual landscape to survive. The game is noted for its rich storytelling, character development, and multiple endings based on player choices. It's a blend of romance, mystery, and the struggle for survival, appealing to fans of narrative-driven games and the otome genre.