>Your idea is not valuable, at all. All value is in the execution. You think you are an exception; you are not. You should not insist on an NDA to talk about it; nobody serious will engage in contract review over an idea, and this will mark you as clueless.
John Carmack is unusually direct and asserts pretty much the same things a couple of weeks back. [1]
>This will never, ever work. Nobody will build your game idea and give you money for it. If you go through the development process, you will find that the original idea is a very small fraction of the value.
[1] https://twitter.com/ID_AA_Carmack/status/931653803199275008
Edit: typo s/in/is