FreeBSD is used a lot on servers but it can be used as desktop operating system as well. You may not be able to play the latest Windows games, but there are plenty of cool board games you can play on FreeBSD (and PC-BSD / DesktopBSD)
K.C. Smith has a post on board games on FreeBSD.
Cool board games… On FreeBSD, of course. There’re many great games in ports of course. In the area of board games, gnuchess, gnugo, and gnubg have been around for a while and are all excellent. gnubg (backgammon) is a very tough opponent! Turns out computers are a lot (lot!) better at backgammon than they are at Go.So, I like board games. I also like to play board games against humans because, well, I guess I’m not that good at them. :) If you’ve got your java web-plugin working, you’ve got a great variety of games you can play against other people on-line. Yahoo! games uses java and has a large user-base and selection of games.
Recently, though, I’ve discovered this website called BoardSpace. It also uses java and works great on FreeBSD. They have bots available for many games — which is nice, it gives you a chance to learn the basics before playing against other people. And, they have a large variety of unusual games.