Minecraft wiki entry for Creating_Forge_mods, associated text: This wiki article aims to provide a foolproof walk-through of a few key elements of Forge's tutorial: https://mcforge.readthedocs.io. Bookmark their page, as it addresses many issues this article will not. Moreover, there's more than one valid way to achieve the desired result; this wiki article will focus on the simplest, which is probably not the most efficient or elegant. If you follow precisely the steps outlined here, you should soon have a functional mod, which you can then tinker with to your heart's content. If you use Linux, Forge's tutorial will probably be more useful for you. If you use Windows, read on.