Titan Quest Gold - $4.00 (Steam)
I'd advise against getting this version, even if you're fine with Steam. I got it on a cheap sale, too, and for some reasons had problems to get it to run correctly.* Bought the DRM-free version from GamersGate later on, and that one worked perfectly fine. It's English only, while Steam supports several languages, but since the original is English and the German version is cut on Steam anyway, I didn't mind.
* EDIT: I should mention that I got Titan Quest from Steam, not Titan Quest Gold (which I got from GG), so there's a possibility that my issues were related to the main game only, not the Gold edition. But no guarantees.