The UnionLib library was created by the Stereowalker, specially for his own projects. It is currently required to run the Survive, C.O.M.B.A.T and Controller Support mods. So, you only need it if you want to play with them. For other mods, the library is not yet used.
How to install UnionLib Library
- Make sure you have installed Minecraft Forge.
- Download the mod for your version of the game.
- Put it in the ‘mods’ folder, which is located in the game folder.