You should have done research before you made your purchase. Buying a computer is a big purchase (at least I think it is). You should have determined what you needed the laptop for. Is it for school, work, gaming, or a little bit of everything?
Your laptop you could use for school.
That being said, if you bought a Macbook STRICTLY for gaming, you are out of your mind. EA has a $699 PC that can play Crysis on max settings. Hell, for the money you spent on the MacBook you could have used it to build a really good gaming PC. Or if you wanted the reliability that comes with Apple machines AND you wanted gaming, why didn't you go for a MacBook Pro?
And don't say you were ripped off. I'm sorry, but I can't stand ignorance. You can't go to walmart, buy clothes, go to a party, have everyone laugh at you, then say you were "ripped off." Or you can't buy a DVD player and find out you can't play BluRay movies and complain that you were "Ripped off."
Another thing, if they made a Mac version it won't run better. It won't change the fact that you still have an integrated GPU.