[Nyx]

Not that it's overly complicated/complex like some of the games you listed but I love Civ 5. Civ 6 was a bit of a let down to me (Wonders taking a tile to themselves makes total sense realistically, but fuck it was an annoying mechanic coming from Civ 5) but on any given night I can open Civ 5 and pound out a 200-300 round game. Now that I'm talking about it, I might just actually do that tonight.