Isemono is a visual novel with a linear story and no branching choices, as it follows the original novel, which has been officially published with an ISBN. The game features a fantasy and adventure setting, with isekai, comedy, and slice-of-life as its subgenres. The visual novel includes standard VN features such as Save, Load, Auto, Skip, Log, Gallery, Achievements, and support for two languages. In addition to the main story, players can enjoy several minigames, including a quiz game, a short battle game, and the YoichiOut game.