Undertale Fan Games - AU Fight is an arcade game available on Android that offers a compilation of various Undertale fan creations. This game features a diverse range of battles from different Undertale universes, showcasing both original content and contributions from other creators. It serves as a platform for fans to experience unique interpretations and challenges within the Undertale narrative.

Currently, the game includes four distinct battles: the Swapfell Papyrus fight featuring Dissension & Hypermaniac, the Bad Time Trio Remastered known as Triple The Threat, the Trios The Squabble with the phrase "IT'S THE HUMAN!!," and the Underswap Sans fight titled Bone To Pick With You. The game emphasizes collaboration, inviting creators to contribute their work while also respecting the original creations of others.