Currently, GNU Backgammon is actually designed for GNU/Linux. It also compiles and (hopefully) runs under *BSD, IRIX, Solaris and True64 Unix. Last but not least there are frequently binaries for MS Windows. It has also been ported to MacOS. When you successfully port GNU Backgammon to other operating systems, you are welcome to give us a note at the GNU backgammon mailing list.