How do I register a game idea as mine legally before turning it in?

[twesterm]

And just a few notes for the future for spotting painfully obvious scams like this:

1. A game studio will almost never ask you for an idea (actually never, I just say almost because I'm sure some ass has a single counter-instance).  They do not need your awesome idea.
2. Actually look at the site-- that site has a stock background and two stock pictures.  Game studios have artists, they don't have to use stock photos.
3. They want you to pay to enter contest and for sending in your idea and then they get to keep it.  El.  Oh.  El.
4. "Industry professional" is a broad term.  I'm 99% sure that the person who made the site is or knows an industry professional but they're probably a tester or someone incredibly low level who has no pull what-so-ever.

If you want to protect your ideas or get your ideas out there, your best bet is to just make the game and put it out there.