This is preety cool a freind sent me a link to this http://www.fpscreator.com/ kinda look like the first half life game engine i think
i already made a game using it released only to prem-members for now but ya it is pretty good software i like but u still got to work out most of its bugs and it takes alot of time to make 1 game and u need a good computer aswell
its in the premium members discussion area, you have access to it, its titled free FPS game or something like that...