FNF Corruption Calamity
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FNF Corruption Calamity


A FNF Corruption mod where Boyfriend battle against a mysterious corrupted entity of himself as a result of a error in compiling the source code.


  • Prologue
  • Grace
  • Game-Over


You are a 16 year old boy named [REDACTED].

You’ve come across a mysterious source code rewrite online about the popular game, “Friday Night Funkin”. Being the curious dev you are, you compile the game, and only when you think things are okay, you get greeted by a mysterious entity. One that’s able to speak directly to the player.

FNF Corruption Calamity Mod Credits:

If you had fun and would like to keep up-to-update on the mod, please make sure to support the cool mod creators on their social media platform. Also follow for other projects they are working on.

Game Engine Credits:

  • Shadow Mario: Main Programmer
  • bbpanzu: Additional Programmer
  • RiverOaken: Main Artist/Animator
  • Also everyone that contributed on GitHub.

Original FNF Credits:

  • ninja_muffin99 – Programming
  • PhantomArcade3k and evilsk8r – ARTISTS
  • kawaisprite – TASTY MUSIC
  • AND everyone that contributed to the GitHub source.

The goal of this web optimized port is to make FNF and this mod more accessible to players that can’t otherwise play it on their potato PC, on a Chromebook,  on their Mac, on their Linux, or simply can’t run the EXE files on their computer. Also help save hard drive space. Please keep in mind that this online web port might be slightly different and/or have missing mechanics than the PC version. So make sure to also get the PC version if you have a PC.

If you want a challenge, turn off Ghost Tapping in the settings.

Recommend using Google Chrome to play FNF Mod for the best performance.

Jam to the beats and just have fun!

FNF Corruption Calamity is a online Rhythm Game you can play for free in full screen at KBH Games. Easily play FNF Corruption Calamity on the web browser without downloading. Hope the game will bring a little joy into your daily life.