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I got this game through Stardock, then Steam. Both Stardock and Steam says it works with Windows XP/SP3, and the official website also says it works with XP...

So I'm just wondering if the gamecard here on GOG is wrong, or have they done something that truly removes XP runability? I'd love to own the DRM-free version here, and have a version that can run on all my machines (including the older XP one). Thanks!
I plan to buy a modest PC with XP SP3 to play GOG games, so I second this question.
I know that version 1.8 works on XP.