Just a small question, but probably has a convoluted answer unless I missed it.

Is there any particular reason or answer definitive or otherwise why Civilization I & II have not been re-released like the other entries that we have on GoG?

I still have the original on the Explorer's CD pack which has the DOS and Win releases coupled with Colonization which strangely IS up on this site.

One of the reasons:
The better versions of Civ1 and Civ2 were Windows 3 and Windows 95 era, which aren't very easy to get running nowadays. A lot of games in that "post DOS, pre-XP" era are like that.

Yes, there are DOS versions of Civ1, but people might be upset at them.

ALSO (more likely) 2k's not exactly toooooo friendly with GOG most of the time.

Civilization 2: Test of Time was a "modern" remake of Civ2 released at the same time as Alpha Centauri. I'm sure getting it to work on Win10 is not that much of an issue :P.

I think it's more that GOG and 2K are not on good terms then any problems gettings the games to run on modern systems. The Civ community has come up with a number of work arounds to get CIv 2 to run on a modern system.

Better by which account? The Windows version of Civ 1 is ugly and clunky compared to the DOS version (just as Colonization), so I can't imagine anyone seriously preferring it to the DOS version (which still looks nice on modern monitors).

I was thinking CivNet.

Be sure to vote for the games in the wishlist. Lots of entries so here is just a link to a search:
https://www.gog.com/wishlist/games#search=civilization

Would personally love to see Civ 1 + Civ 2 on GOG.
More people need to witness the advisor FMV's from Civilization 2, especially during the ANARCHY!!! events.
https://youtu.be/XqPC08cPGJw

Think it might be a licensing thing, similar to Mechwarrior 1 - 4 games versus PGI's Mechwarrior Online and Mechwarrior 5. aka the older games getting released would kill any and all sales/participation in MW5/MW:O.

Want to say that Civilization 1 has embedded DRM/copy-protection that may be difficult to remove.
Civilization 2 has at least two versions, both of which have different AI settings.

Any idea what the differences between the Windows and DOS versions of Civ1 are?

I have to presume that the Wndows Version of Civ 1 doesn't look so chunky. You can probably peep Mobygames.

Both Civ 1 and 2 are instant buys for me if they become available.

Is this a new development? I don't think I've heard anything about 2k and GOG.

We've had so many releases from 2k, that I was actually hopeful for Civ 5-6 to make their appearance. These two, and X-COM 2 are the only games by 2k that I'm still interested in getting.

Actually there's also Borderlands. :)

For Civ II, both Multiplayer Gold Edition and Test of Time are compatible with Win10, but making the videos work is a different thing, since they use an old driver (Indeo 4 in MGE and Indeo 5 in ToT) that are by default disabled on modern OS. And MGE uses CD Audio for music (not sure right now about ToT), but there are user patches to enable them and fix some other bugs.

The game simply asks about technology dependencies after a certain number of turns. Its copy protection was easily broken already after it was released (as was the case with most other copy protected titles from MicroProse), and even with it untouched, looking up the manual is not difficult for us oldfags. (Most people who would buy it here can answer the copy protection questions without even looking up anywhere, they are so basic).

You are wrong. It is the Windows version that is plain ugly. I played it in Win 3.1 and just couldn't stand the colors and overall clunkiness, not to mention the horrendous interface inherited from Windows. In fact even Civ 2 looks worse on modern screens than Civ 1, but I would buy it nevertheless.

In general, it is always DOS games that aged well, while early Windows titles usually didn't preserve well for all sorts of reasons.

Strange. I thought Civ 2 looks fine for the game that it is, (Certainly better than Civ 3), and I know I've seen a few people harp on how the Windows version of Col looks better.