Sans Multiversal Battles!

Sans Multiversal Battles! is a PvP fighting game on Roblox developed by flygeil in which players morph into Sans characters from Undertale Alternative Universes and battle each other. Created in January 2020, it accumulated over 94 million visits and inspired a Fandom wiki with 507 pages before the developer officially closed development in May 2023. The game remains open and playable as a legacy title - one of the original Undertale AU fighting games on Roblox.

Players choose a Sans morph from the available roster and fight in a shared 20-player arena. The entire progression system revolves around grinding LOVE (Level of Violence) - the same mechanic from Undertale lore. Players earn 50 LOVE per interval through continuous play, working toward major milestones:

• ⚔️ LOVE grind - accumulate LOVE through battles; milestone badges mark 100K, 250K, 500K, 750K, and 1M LOVE
• 💎 RESET - the prestige mechanic at 1,000,000 LOVE; resets your stats in exchange for permanently increased LOVE gain rates going forward
• 💎 Trio Characters - a gamepass (550 Robux) unlocking five powerful Trio morphs: Bad Time, Good Time, Mad Time, Murder Time, and Error Time Trio
• 💎 Special Characters - a gamepass (750 Robux) unlocking six rare morphs including Hyper Dust, X-Dust, Shattered Dream, Mix!Sans Infected, Virus 404 Sans, and Final 404

Sans Multiversal Battles! does not have co-op modes, PvE bosses, or alternative game modes - combat is purely player-vs-player across the single main arena. The LOVE grind and RESET prestige cycle define the full long-term loop, and both gamepass packs add the strongest characters in the roster.

For players looking for an actively updated Undertale AU fighting game, Sans AUs Fighter 2 is the current leading title in the genre with more modes, characters, and frequent updates.