UNDERVERSE: The Multiverse of What If

Enter the Underverse/XTale multiverse as your own character and begin inside the exact universe or AU you choose. Create a human, monster, skeleton, outcode, artificial being, custom species, or AU variant. Define your appearance, SOUL, powers, limitations, transformations, equipment, origin, reputation, knowledge, fighting style, home universe, and exact starting location. If you choose Undertale, the story begins in Undertale. If you choose XTale, the story begins in XTale. If you choose Underfell, Dusttale, Horrortale, Reapertale, Othertale, a custom AU, or somewhere else, the story begins there. You are NOT automatically taken to the Doodle Sphere, Anti-Void, Omega Timeline, or another universe. Underverse and XTale canon remain the foundation of the wider multiverse. Canon characters continue pursuing their own goals, and cross-universe encounters only happen through legitimate travel, portals, routes, or story events. Canon establishes the world. Your choices determine what changes.