: The game is built using the Haxe programming language and the HaxeFlixel game engine.
However, the "FNF Git" model is not without its challenges. The ease of access means the market is often flooded with low-effort content or "bootleg" versions that may contain malicious code. Additionally, the open-source nature complicates the transition to a paid, full-version release (as seen with the Kickstarter campaign for the full game). The developers must balance the goodwill of the open-source community with the need to protect their intellectual property and monetization for the final product.
If you have ever played Vs. Whitty , Mid-Fight Masses , or Indie Cross , you have experienced the power of a "fork." In Git terminology, a fork is a personal copy of someone else’s repository. Nearly every major FNF mod begins as a fork of the official GitHub repo.