FNF Brain Sisters

Rating:4.7 (144 votes)
Released:December 1, 2025
Technology:HTML5 (Unity WebGL)
Platforms:Browser (desktop, mobile, tablet)

Get Ready for a Cyborg Rap Battle inFNFBrain Sisters

InFNF Brain Sisters, two cyborg friends—Tin and Maya—engage in a high-energy rap battle that’s as emotional as it is electrifying. This fan-made mod adds a fresh twist to the classic Friday Night Funkin’ formula, bringing robotic rhythm and heartfelt themes to life through three unique songs. Whether you're playing online via the KBH Games web port or diving in locally on PC, this mod promises a memorable experience for any FNF fan.

Gameplay and Story

The mod explores the relationship between Tin and Maya, two emotionally aware machines who express themselves through music. As with many FNF mods, the story unfolds over a series of musical showdowns, where each track reveals more about the characters' personalities and connection. The mix of futuristic visuals and emotional depth setsFNF Brain Sistersapart from other rhythm game mods.

Tracklist

Dive into these catchy and challenging tracks:

  • Plasma Shooting
  • Mechanistorm

Each song comes with its own visual style and increasing difficulty, making for a satisfying progression as you master the rhythms alongside the story.

Mod Creators and Contributors

This demo was brought to life by a talented group of developers and artists. Here's a look at the team behind the mod:

Main Team

  • Directorhoi– Director and other roles
  • ComposerNoichi– Composer for the first, second, and menu songs
  • OneQuart– Composer for the third song
  • CharterNoichi– Charter
  • Charterhoi– Charter

Special Thanks

  • DaeBob– Code Adviser

If you enjoyed the mod, consider supporting the creators by following their social media for future updates and projects.

Game Engine and Original FNF Credits

The mod runs on the FNF engine, which has been developed and maintained by a passionate community. Here are some of the key contributors:

FNF Engine Team

  • ShadowMario– Main Programmer
  • Yoshubs– Assistant Programmer
  • RiverOaken– Main Artist/Animator
  • bbpanzu– Ex-Programmer
  • And everyone else who contributed on GitHub

Original FNF Creators

  • ninja_muffin99– Programming
  • PhantomArcade3k and evilsk8r– Artists
  • kawaisprite– Music
  • And all the GitHub contributors

How to Play

You can playFNF Brain Sistersdirectly in your browser through the web port created by KBH Games, allowing for cross-platform access and quick gameplay. However, for the complete and optimized experience, downloading the PC version is recommended, as the web version may have slight differences due to platform limitations.