AU-Remix Games

Step through portals to alternate Undertale universes! Our AU collection reimagines the classic Sans battle through the lens of parallel realities and creative twists. Face the cracked skull and eerie grin of Horrortale Sans in a blood-soaked judgment hall, dodge star-shaped projectiles from Storyshift Asriel, or take on the impossible challenge of battling multiple AU characters simultaneously. Each game preserves the soul of the original fight while introducing fresh mechanics, visual styles, and musical themes that make every AU encounter a discovery of new possibilities in familiar territory.