FNF Not the Nice Guy Anymore vs Sans

Rating:4.3 (109 votes)
Released:December 21, 2025
Technology:HTML5 (Unity WebGL)
Platforms:Browser (desktop, mobile, tablet)

Face Off AgainstSansin This EpicFNF Mod

Get ready for a musical showdown like no other! In theFNFNot the Nice Guy Anymoremod,Boyfriendtakes on Sans fromUndertalein an intense rap battle set to the original track“Not the Nice Guy Anymore.”This fan-favorite mod is now available to play online, fully optimized for web browsers across all devices — no downloads or installations required.

Whether you're a die-hardFriday Night Funkin’fan or a lover ofUndertale, this mod brings together two iconic universes in a fun and challenging experience. The mod keeps the classic FNF vibe while introducing fresh visuals and a unique song that captures the essence of Sans' personality.

About the Mod

InFNF Not the Nice Guy Anymore, players get to enjoy a custom song created specifically for the encounter between Boyfriend and Sans. The mod introduces new animations, background art, and a catchy beat that fits perfectly with both franchises' atmospheres. It’s a must-play for anyone who loves creative crossovers and rhythmic challenges.

The web version ensures smooth performance even on lower-end devices such as school Chromebooks, older PCs, or Mac/Linux systems. You can enjoy the mod without worrying about EXE compatibility or storage space. However, note that some features may differ slightly from the full PC version due to platform limitations.

Creators Behind the Mod

This mod was brought to life by a passionate group of creators. Here's a shoutout to the talented individuals who made it happen:

Mod Team

  • Malke: “dont look behind you”
  • Zyas: Song creator
  • Toriel image: “press enter”
  • Undyne image: “press enter”

Game Engine Contributors

  • ShadowMario: Main programmer
  • Yoshubs: Assistant programmer
  • RiverOaken: Main artist/animator
  • bbpanzu: Ex-programmer
  • Additional contributions from the open-source community on GitHub

Original FNF Development Team

  • ninja_muffin99: Programming
  • PhantomArcade3kandevilsk8r: Artists
  • kawaisprite: Composer
  • And everyone else who helped build the foundation through GitHub

Play Anytime, Anywhere

Thanks to its web-based format,FNF Not the Nice Guy Anymoreis more accessible than ever. Whether you’re at home or on the go, you can jump into this exciting rhythm battle anytime. Just head over to the online port and start playing right in your browser!

So, are you ready to prove your skills against one of the most memorable characters in gaming? Show Sans what you’ve got!