Install Visual Studio. During installation, make sure to check the "Desktop development with C++" workload. This provides the necessary compilers for Windows.
Psych Engine is the gold standard for FNF modding. It was created to fix the performance issues of the vanilla game while making modding accessible to non-programmers via Lua scripts. If you want to install custom characters, weeks, or mechanics without rewriting code, this repository is essential. 2. Kade Engine (KadeDev/Kade-Engine) fnf mods github