- Large open world
- Turn-based combat
- Branching quests and meaningful C&C
- Skill check heavy dialogue
- Nice story and worldbuilding
- Good visuals and music
- Relatively polished and bug free
- 40 hours of content
Age of Decadence, Underrail, and Kingmaker have threads with over 500 pages. How the hell does this gloriously inclined CRPG, which has been out for over a year, only have an 18 page thread? It's criminal!
Well, as for why those games are popular:
(a) the Codex has a large Slavic population that war ships Eastern European releases
(b) the first two games are spiritual successors to the Fallout lineage of game design (Codex primally being a Fallout/Troika fan site)
(c) Kingmaker is the first real Baldur's Gate II successor, Pillars of Eternity is more of a re imagining -- Baldur's Gate 2 was a mega popular game. Also a faithful interpretation of Pathfinder, so it has some often underestimated PnP/brand name cred.
As for why Expedtions (including the first one) isn't popular:
(a) there aren't that many Danes here
(b) it's not a clear successor to any beloved classics, although Vikings did import some design sensibilities from outside lineages, Baldur's Gate especially
(c) despite what people constantly say, most people aren't interested in a grounded historical setting as opposed to a fantasy or sci fi one -- the ones who are are the ones who follow Expeditions threads