Have a look at Silverbullet, selfhosting is fairly easy, using it on one device (offline) as well. Watch the videos, it’s quite powerful.

Opening theme of Civ VI. It‘s Songno di Volare nade by Christopher Tin.

So remake as the website says? 🤔

Widelands - Settlers II inspired game, played a couple of hours, pretty neat.

FreeCIV - how can that gme be missing here? :)

UnCIV - Civ V clone, also pretty neat