It's not working that way :)

Let me just point you HERE (and he's a moderator here) for some reality-check advice.

If you can find yourself described in these articles, then maybe you can start asking the right questions.

Yeah, I agree with the above posters: sorry, it doesn't work that way. Anyone actually capable of producing a playable game has abundant sources of ideas available to them, they have no motivation to swipe yours. Professional game developers don't generally hire writers based on portfolios, and if they did hire a staff writer that way you wouldn't be using any of your existing concepts in their game, you'd have to start at the bottom writing item descriptions and dialogue to fit into their already-developed story concept and outline. You're not going to find too many people willing to offer you their help with no offer of reward and asking them to go to the additional effort to seek you out through a different communication medium.

If you really really don't want to share any of your "real" game story ideas, you might at least try making up a new idea for public practice.