I've got a good idea of a game from a game I'm playing since I was a kid. It is player-to-player game and is pretty entertaining. This game is pretty much nerve-wrecking. And you need guts to win.
I'm a web developer and needs a sponsor to develop this game or just get the game idea. I'd like to play this myself.
Why not copyright your concept first for a cheap price. Once this is done, no one can steal your idea.
You can then make a proto type or an algorithm for how the game will be done.
Then code it.
Then release it.
Simple, cannot see why a sponsor would really be necessary.
You will have to hope that this idea has not been Copyrighted already. Most cool games has some sort of Copyright and you will have a uphill battle to Copyright it. I have seen many projects being cancelled, because people did not do their research before they started with the project and their idea was already Copyrighted by someone.
In the end these battles are fought in the courts and they end badly for the people who tried to steal the intellectual property rights of the existing Copyright holders.