I was noticing that the Universal Binary Games guide didn't have any comments. While I don't have enough posts to edit it myself, I'd like to say that Railroad Tycoon 3 works fabulously on a CoreDuo Mini. It's considerably faster at both high and low resolutions than my old Sawtooth (with a Radeon 9000 and a 1 Ghz Powerlogix chip). I get rock solid 70+ fps at the default res. Cranking up the resolution it's still very playable (~20 fps) at 1024x768 with high quality textures. My old Sawtooth got 25 fps at default and 3-4 at the higher res.