Since #GOG is so much smaller than Steam, it's sadly logical that a percentage of publishers/developers treat their releases there as an afterthought. When that morphs in a small percentage of them completely forgetting to update their #games on GOG with the latest patches, that becomes a serious issue. With noticeably increased energy under its new owner, GOG has now started an initiative to tackle this and slowly whittle down the list of such games, where they promise biweekly updates on their progress: https://www.gog.com/forum/general/from_good_to_great_improving_our_games_together