A number of Freeciv packages are included in Debian. Try apt-cache search freeciv To install Freeciv with the GTK+ client, install the freeciv-server and freeciv-client-gtk packages. For example, using apt-get: apt-get install freeciv-server freeciv-client-gtk The version in Debian stable will usually not be the latest, and if you want to join a multiplayer game it may not be compatible with the server, but backports may have something more recent.