A highly regarded mod that replicates the original animation’s choreography, hosted on Game Jolt .
For those using the Unitale engine, Akumaaaa’s mod can be found on Game Jolt .
The mod is famous for its extreme difficulty and emotional weight. Unlike the standard Papyrus fight, this version features multiple "Phases" that evolve as the battle progresses: Undertale: Disbelief Papyrus by Raylynx Esper - Game Jolt
The is a prominent fan-made expansion for Undertale that explores a "Genocide Route" where Sans dies first, leaving Papyrus to become the final boss in the Judgement Hall. Originally inspired by a popular fan animation, multiple playable versions and mods have been developed to bring this intense battle to life. Where to Download Disbelief Papyrus
A musical crossover mod is available on GameBanana for fans of FNF. Gameplay Features & Phases