I can make a free server- Its for tremulous, and online free pc game, where humans face against aliens- 3D Graphics, requirements for computers, etc.
http://tremulous.net/files/for download 1.1.0 ONLY- pick windows, linux, etc. depending on computer.
www.tremulous.net/manual/shortcut to information
People can create servers, public and private like with a password, for clans, etc.
Humans: They can improve with weapons such as lasers, pulse rifles, lucifer cannons, etc.
Aliens: They can improve by evolution, and by amount of kills.
Goal: To Destroy all opponents spawn points, telenodes (humans) or eggs (aliens)
The main source will prevent evolution/power to get weapons, etc. if destroyed
Anyway, just reply of what you think, and you can read more to get the idea of how to play
Recommends ATCS- easy training server good for any type of player.