A .rar file is a compressed archive used by modders to bundle complex file structures—like textures, scripts, and meshes—into a single, smaller download. Modders often prefer .rar or .7z over standard .zip files because they offer better compression, though they require specific software to open. How to Install Mods from a .RAR Archive
Installing these mods usually involves extracting the contents into your game's directory. While every game is different, the general process follows these steps: mod.rar
Here is everything you need to know about what these files are and how to safely get them working in your game. What is a .RAR File? and meshes—into a single