Do you like old skool deathmatch action? Give Sauerbraten a try. It's a free and open-source first person shooter. Currently the Catbox is hosting a Sauerbraten server for testing purposes. If the server is popular enough it will stay permanently. To find the server, look for a server named "mucosmos.nl Zuurkool" in the server browser or use the following command: "/connect ts.mucosmos.nl". You can download the Sauerbraten client for Linux, Windows and Fag OS X here: http://sauerbraten.org/