FNF vs Sans (Fallen Star)

Rating:4.3 (126 votes)
Released:May 11, 2026
Technology:HTML5 (Unity WebGL)
Platforms:Browser (desktop, mobile, tablet)

Battle It Out in Space withFNFvsSans(Fallen Star)

Get ready to dive into a cosmic rhythm battle withFNF vs Sans (Fallen Star), a fan-made mod that brings one ofUndertale’smost beloved characters to the Friday Night Funkin’ universe. In this thrilling encounter,Boyfriendfaces off against the laid-back but powerful Sans in a high-stakes musical showdown set among the stars.

This mod takes players to an asteroid in outer space, where the fate of the galaxy might just depend on your sick beats. With its unique setting and intense vibe,FNF vs Sans (Fallen Star)stands out as a must-play for any FNF or Undertale fan.

Epic Showdown: Our Broken Constellations

The mod features a single, epic track titled“Our Broken Constellations”, which blends emotional depth with challenging rhythms. The song captures the gravity of the situation — literally and figuratively — as you face off against Sans in a battle of wits, willpower, and timing.

With complex note patterns and dynamic shifts in tempo, this level offers a satisfying challenge for both newcomers and seasoned rhythm gamers alike.

Meet the Team Behind the Mod

Like many great mods,FNF vs Sans (Fallen Star)is the result of passionate collaboration from talented individuals across different creative fields. Here's a look at the amazing team who made this interstellar battle possible:

Core Creators

  • AlexR_22: Owner / Main Musician
  • Jloor: Main Coder
  • ZERO ARTIST: Main Artist / Animator
  • NexusMoon: Musician
  • SoyJulian_34: Background Artist
  • Lucio: Main Charter
  • Manux12: Coder

Special Thanks

  • ShadowMario: For providing the FNF Game Engine

If you enjoyed playing this mod, consider supporting the creators on their social platforms by following, subscribing, or sharing their work. They put in countless hours to bring you these incredible experiences!

Original FNF Contributors

This mod runs on the classic FNF framework built by an awesome community. A huge thanks goes to the original developers:

  • ninja_muffin99– Programming
  • PhantomArcade3kandevilsk8r– Artists
  • kawaisprite– Composer
  • And everyone else who contributed to the open-source project on GitHub

Play Anywhere with Web Optimization

Designed with accessibility in mind,FNF vs Sans (Fallen Star)has been optimized for web play. Whether you're using a low-end PC, a Chromebook, Mac, Linux, or simply can't run .exe files, this version ensures that more players can enjoy the mod without technical limitations.

So gear up, hit those keys, and show Sans what the power of music can do — even in the far reaches of space!