The Altera Centauri collection has been brought up to date by Darsnan. It comprises every decent scenario he's been able to find anywhere on the web, going back over 20 years.
25 themes/skins/styles are now available to members. Check the select drop-down at the bottom-left of each page.
Call To Power 2 Cradle 3+ mod in progress: https://apolyton.net/forum/other-games/call-to-power-2/ctp2-creation/9437883-making-cradle-3-fully-compatible-with-the-apolyton-edition
Question about upgrading units. I know you need to move the unit into a city with a barracks, but can you upgrade all units of that type by doing this? Ie. Can I upgrade all my Pikemen by moving just one into a barracks city?
No, but if you press Shift-U, you can upgrade all the units of the type selected which are in a city with barracks.
So if you have 10 pikemen, 6 in cities with barracks and 4 not, pressing Shift-U when one of the 6 pikemen is activated will upgrade all 6 (after telling you the cost and giving you the chance to back out, obviously).
Comment