from a technical aspect it's problematic 3 fold 1: you need achievements. This means integrating a progress tracking of some sort, its coming along but is certainly far from being read in game already 2: you need steamworks integration. This is something the devs have decided they will not add, and they are hardly the only developer, less than 50% of titles available on steam have it and thus have no steam achievements. There are a number of good reasons that they have chosen this route; Parity for all players regardless of purchase platform, inclusion overheard on both the developement time and cost to include it, as well as the time necessary to actually give it a purpose. 3: you need to deal with the bugs that pop up from applying these two systems to each other. Have you ever SEEN the steamforum whineflood when "I DIDNT GET THIS ACHIEVEMENT AND I SHOULD HAVE! FIX NAOW!