FNF MettaMania Mod

Rating:4.4 (198 votes)
Released:December 21, 2025
Technology:HTML5 (Unity WebGL)
Platforms:Browser (desktop, mobile, tablet)

EpicFNFCrossover withUndertaleFavorites

Get ready to drop the beat with some ofUndertale’smost iconic characters in theFNF MettaMania Mod! This fan-made mod brings the funky fun to a whole new level as you face off against lovable characters likeSansand the glamorousMettaton. With a total ofsix original songs, this mod delivers a vibrant mix of rhythm and nostalgia that both FNF and Undertale fans will enjoy.

Whether you're looking to test your skills on some fresh beats or just want to groove to some Undertale-inspired madness, MettaMania is a must-play mod. It's also available as aweb port, so you can enjoy it right in your browser—perfect for those who can't run the full game locally.

Tracklist: Groove to These Original Songs

The mod features a solid lineup of custom tracks, each with its own unique vibe and challenge:

  • Quized
  • Crushed
  • Glamour
  • Comic
  • Determined
  • Swapped

Each song offers a distinct flavor, keeping the gameplay fresh and exciting as you switch between characters and rhythms. The music perfectly captures the charm of bothFriday Night Funkin’andUndertale, making for a truly memorable mod experience.

What Makes MettaMania Special?

This mod stands out with itscute and stylish art style, catchy original music, and fun character interactions. It's a great example of how the FNF modding community continues to push creative boundaries, blending universes in a seamless and entertaining way. Whether you're a long-time FNF player or a newcomer to rhythm games, MettaMania is a delightful addition to your playlist.

Play Online with the Web Port

For players onChromebooks, Macs, Linux systems, or anyone with limited storage, theFNF MettaMania web portis a fantastic option. It allows you to play the mod directly in your browser, without needing to download or install anything. Just keep in mind that the web version may haveslightly different mechanicsor missing features compared to the original PC build.

Mod Credits

This mod was brought to life by a passionate team of creators:

  • THE_KIRB: Creator of the concept, music, art, and a bit of code
  • Cow: Code assistance and icon design
  • ShinkoNet: Provided MIDI reference tracks

Game Engine Team

A big thanks to the team behind the FNF engine:

  • ShadowMario: Main programmer
  • bbpanzu: Additional programming
  • RiverOaken: Main artist/animator
  • And all the contributors on GitHub

Original FNF Creators

We also salute the original developers ofFriday Night Funkin’:

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

So if you're a fan of rhythm games,Undertale, or just love a good FNF mod, giveFNF MettaManiaa try—you won’t be disappointed!