supplementscene: I never had a problem on Steam with a slowish system. It's in my top 3 all time point and click adventures because of the layers and twists in the narrative alongside decent puzzles.
The only thing is it can be had very cheap on bundles from places like Fanatical on occasion but then maybe it has DRM
It's on sale here at the moment at £2.19 - comparable to the cheapest it's been anywhere at any time. The only thing holding me back from buying it are the reports in the GOG reviews of frequent freezing and crashes. Maybe the Steam version is a different build or something. Still I have until 11.00am tomorrow to make up my mind :)