Binding Of Isaac Undertale Mod V3 with the Mad Dummy and boss versions of Sans, God Asriel and Mettaton. A Mod was recently released for The Binding of Isaac Rebirth: Afterbirth DLC which contains a ton of Undertale themed things. We have tons of characters including Sans, Papyrus, Undyne, Asgore, Toriel, Mettaton, Alphys, Asriel, Naptsablook, Temmie, WD Gaster, Omega Flowey, and more. There are also Undertale themed levels in this The Binding of Isaac Rebirth Gameplay Mod. Undertale Playlist.