you don't just PITCH your idea to a company. that is a road to getting corporately ass kicked. you have to copyright it somehow. i think you have to go to the writer's guild or copyright office. plus you cant just give a vague idea, you need to work out ALL the variables. you cant just say "uhhh, this game will be about zombies who wear hats" and expect them to like it. you need to have the entire game thought out and presented. you will also get a cut DEPENDING ON HOW MUCH OF THE GAME YOU THOUGHT OUT. that is important to getting money.
EDIT: you also need a PLAYABLE DEMO for them to see your idea. no demo, no deal.
