A Lose Hero in the Castle of the Succubi is a 2021 indie adventure game developed and published by Dieselmine . The game utilizes pixel art to depict a dark fantasy setting where players explore a "Demon Castle" and interact with various succubus characters.

: Supported languages include English, Simplified Chinese, and Japanese.

: Critics and users note the psychological horror underlying the lewd premise; the protagonist’s "future is literally being drowned by pleasure," as the succubi treat him as a plaything, systematically ruining his body, mind, and potential. Gameplay and Design