What about From Dust (
http://store.steampowered.com/app/33460)?
The 2011 MBP 13" meets the minimum requirements in terms of processing speed and RAM. It doesn't say it will work on the Intel HD 3000, but it does say that the GPU needs 256MB and I think the HD 3000 on the i5 has 380-odd MB.
Sorry I keep coming back with "what about this game, what about this?" but it does factor into my decision of what laptop I'm going to get next. I'm not a hard core gamer by any stretch of the imagination, but I'm wondering whether it would be worth getting a laptop that's not as restrictive in its gaming options as my faithful old iBook.