Freeciv is a single or multiplayer, turn-based strategy game modeled after Civilization™. In this game, each player leads a civilization and fights to become the greatest in the world. You can play with the computer or with other players over the network.
The program is cross-platform with support for Mac, Linux, BSD, Solaris and many more.
Alternatively, Freeciv Portable is also available.
Note: last 32-bit Windows download available from
https://sourceforge.net/projects/freeciv/files/Freeciv 2.6/2.6.11/.
