Multiplayer Linux Games

gooshy1 writes "Ok it's getting near the end of the year and people are beginning to wind down for the holidays. What I want to know is are there any decent multiplayer games that an office of about 4-7 can play, preferably action. The machines that we use are not all that great, P4 1.7Ghz with 2 year old NVidia graphics cards, so Quake and the likes are out of the question. A favorite is BZFlag due to its playability and nice tunable graphics. All thoughts welcome, and Merry Chistmas/Happy Holidays :-)"