Note austin987 depend on your version of Linux you might already have one of the open source doom engines for Linux too. Check you package manager. You are free to try to make it work but from a I want it to work simplely point of view the open source engines are simpler. http://freedoom.sourceforge.net/download/ << There are a few full IWAD replacements for doom out there that are free too. So the engines get a lot of use.
