While not exactly the same, there is also https://www.freeciv.org/

ixv0 10 hours ago | parent | next [-]

Also worth mentioning is C-evo, even if it's not being developed further afaik

	▲	boredhedgehog 3 hours ago \| parent [-]
		C-evo development shifted to forks, New Horizons and Distant Horizon. https://app.zdechov.net/c-evo/ https://sourceforge.net/projects/c-evo-eh/

culi 5 hours ago | parent | prev [-]

- civ 1 --> OpenCiv1

- civ 2 --> FreeCiv

- civ 3 --> OpenCiv3

- civ 4 --> ???

- civ 5 --> UnCiv