Not to forget:

Civilization: Call to Power (1999)

Sid Meier's Alpha Centauri (continuing where Civilization II ended) (1999)

Call to Power II (2000)

Civilization: Beyond Earth (2014): Spiritual sequel to Sid Meier's Alpha Centauri.

There are of course other PC games that are related to the Civilization series but those are IMHO further away from the "main Civilization series".

SMAC and the Call to Power series were made by different companies than the main Civ series, even though, through the process of the various sales and mergers since, all the rights related to them are, I think, in the same place now.

SMAC was the same people, though you're correct about CtP.

> SMAC was the same people,

SMAC was made by the same people (at least, some of the key people) that made Civ I-II, at a different company (Firaxis) from the one then producing and controlling the IP for the main Civ series (MicroProse) who had, IIRC, laid them off.

Several acquisitions and spinoffs of everyone involved, and all the rights are now with Take-Two, of which Firaxis is now a studio under the 2K games umbrella.

Apart from Alpha Centauri, most Civ fans (me included) prefer to pretend these games do not exist.

I loved Call to Power II and Ages of Man

But I can't play those any more because I'm addicted to hex maps now. And pie menus. I hope Civ 6 has pie menus.

Ouch. This makes me feel old. I remember playing Civ I on my Amiga, on it's four floppy disks.

It's been around for a quarter of a century...

>>The main Civ series has had a new base-game release every 4-6 years, not every year or every other year.

I think my point still stands.

I got downvoted for it though, so it's probably not very popular. :)