Doom BFG Edition for PC (Search on Google for a tutorial on how to rip the iwad and the extra maps from BFG Edition and play it on a sourceport) FreeDoom (FREEDOOM.WAD) (It's a fan-made version of Doom that can be downloaded for free if you don't have a commercial version of it. Games that are supported by Brutal Doom v20b: In the instalation directory, put a IWAD of your game (Doom, Doom 2, etc.) and your copy of Brutal Doom.
Unzip all the content from the sourceport. GZDoom is more advanced and features custom menus, while Zandronum has a client-server multiplayer system that supports up to 64 players, and an older renderer that will perform better on older computers. You can either choose Zandronum or GZDoom.
