Best way to make money off amateur game work, is to put it into your portfolio and get a job. Then once you're employed in a company, you don't have to worry about trying to sell your inventions - everything you invent gets sold to someone automatically in exchange for your monthly pay cheque.

Q. How to sell an idea?

A. You don't.

Q. How to sell an idea?

A. Get 11 more and sell them in a bundle for $0.10.

The short answer is that you can't sell ideas. The longer answer can be found at http://www.obscure.co.uk/frequently-asked-questions/selling-game-design-ideas/

If you want your idea made into a game you will have to do it yourself.

Step 1) Personally develop a ton of well known, great games
Step 2) Earn the clout of Will Wright
Step 3) ???
Step 4) Profit (literally)

That's how you get to sell ideas.

OR!

You can become personally wealthy and finance a group of developers to help you make a game.

> Best in this case to interest some game developing companys.

Many game companies will make your game for a fee. They are called 'contract developers'. The usual fee rate is around US$12K per man-month. An iPhone-type game could go for US$250K to US$1M depending on depth and complexity. For a PC / console game of AAA-quality, we're talking upward of US$10M very easily just to be competitive.

-cb