Free FPS Games

There are many free or open source first person shooters out there and today I would like to talk about a few of them. One of my favorite free FPS games is a very low graphics and simple counter strike clone called assault cube. This game can be run on any rig, and it's only about 50 MB in size, but it can be a lot of fun. All of the source is available and open too, so you could modify it if you wanted to with relative ease. I also like a game called Saubrenten, it is built off of the cube 2 engine and is like asslault cube with much better graphics. It is a little more cartoony than assault cube but it is a good game if you like fast paced fps games like unreal tournament. If you like RTS games than I would recommend something like spring, which can change maps and games.