幻創のイデアOratorioPhantasmHistoria is a visual novel adventure game available on Android devices. The game consists of a suspenseful story that combines battles and puzzles, viewed from the perspectives of two protagonists. Set in a city that was destroyed by past disasters, the game follows the two protagonists' quest to uncover the truth behind the calamities and the city's reconstruction.

The game introduces heroines in the form of girls who are the avatars of mythical creatures, such as Alraune, Cerberus, and Beowulf. These characters have supernatural abilities that players can use to engage in tactical battles against their monstrous enemies. The game is easy to play, making it accessible even for beginners. Players can enjoy the mid-point of the story for free, while those who want to finish the game can purchase the scenario unlock key.

The game's genre is a contemporary supernatural fantasy suspense adventure, with full voice acting and storage usage of approximately 1200MB.