I have started once again playing some Natural Selection. It is a free mod for Half Life 1 similar to the movie Aliens, where marines fight aliens. I have created a marine trainer server where marines fight bot aliens.
Anyone interested can connect to the server at: ns.deadm.com
You can download the mod at: http://www.unknownworlds.com/ns/
The server will probably only be around for a month or two. Depending how long it takes for me to get bored with it.