Sony secures movie rights to indie horror game Mouthwashing with Karyn Kusama directing

Sony has acquired the film rights to the hit independent psychological horror game Mouthwashing from developer Wrong Organ and publisher Critical Reflex. Director Karyn Kusama, known for Yellowjackets, The Invitation, and Jennifer's Body, has been brought on to helm the adaptation. The project will be written by Matt Manfredi and Phil Hay, with Scott Derrickson producing alongside production company Crooked Highway. [1][2]

The 2024 game depicts the psychological deterioration of a stranded spaceship crew facing surreal imagery and isolation. As of February 2025, Mouthwashing sold more than 500,000 copies on PC alone before expanding to Nintendo Switch, PlayStation 5, Xbox Series X/S, and Xbox Game Pass. Sony has not yet announced a release date or casting details, and it remains unknown how closely the movie will mirror the original plot. [1][2]