Freeciv is a multiuser reimplementation for Unix/X of the famous Microprose game of Civilization. By default, the game is an improved Civ II, but this can be customized; modpacks for near-100% compatibility with Civ I and Civ II are included. Multiuser gameplay is real-time: in each turn, all human players move concurrently.

Freeciv is a free turn-based multiplayer strategy game, in which each player becomes the leader of a civilization, fighting to obtain the ultimate goal: To become the greatest civilization.

Freeciv is a multiplayer, turn-based strategy game for personal computers inspired by the commercial Sid Meier's Civilization series. Released under the GNU General Public License, Freeciv is free software. The latest stable version of Freeciv is 2.0.8.