I went ahead and purchased Tidalis via Steam yesterday to give it a try. I wasn't sure if it was my cup of tea or not, but for only 10 bucks, how could I go wrong? I've spent more than that on MMOs I don't even play anymore. Between TF2, some AI War, and my HoI3 game as Canada on the side on top of 'things to do' from a certain someone, I didn't get much playtime yet, but so far so good.