Not sure if the Civ series is, as of now, more popular than PDS games - for instance Hearts of Iron 4 is only slightly behind Civ 6 in terms of Steam players !

Not sure if the Civ series is, as of now, more popular than PDS games - for instance Hearts of Iron 4 is only slightly behind Civ 6 in terms of Steam players ! (And Vicky 3 is way above both, but that's normal for a brand new game with tons of advertising and hype...)