If you plan to edit the engine itself, you will need to compile it: Psych-Slice/P-Slice - GitHub
Inside the extracted folder, find PsychEngine.exe (may also be called FNF Psych Engine.exe ). psych engine 0.5.2 download
The PSYCH Engine is an open-source, multi-platform physics engine designed to facilitate the creation of complex, dynamic simulations in various fields, including game development, architecture, and product design. Its primary objective is to provide a robust, flexible, and user-friendly framework for developers to craft realistic, engaging experiences. If you plan to edit the engine itself,