Most of us have heard about great indie games like Fiasco or Microscope, but what about the great games that many of us haven't heard about? Or games that don't have the audience yet that they should? What are your favorite indie games that are less in the spotlight? What are the great games out there that arn't being played widely enough or being talked about enough, which we should all know about?
Please list your favorite hidden gems.
Note: Usually, I'm very much into folks listing thier own games—just because the game is your own and you're mentioning it doesn't mean it's not amazing or worthwhile—but just for this thread I think it's a good idea to hold off on that.