I only buy Steam games when it's clear GOG won't have them....games that have been out for a couple years (or more). I just finally broke down & joined Steam a couple months ago, despite being a GOGlodyte for years. I currently have 18 Steam games, none of which are on GOG. All were either gifts, freebies, demos, part of a HB, or bought at ridiculously low prices elsewhere. I haven't even paid the full $5 directly to Steam (that they require for me to start posting reviews & such) yet, I think I've only bought like $3 worth of game(s) directly from Steam....everything else has been keys from other (legit) sources.