Hello Linux Geeksters. As you may know, FreeCiv is an open-source version of the Civilization game. The latest version available is FreeCiv 2.4.4, which has been released recently.

From the changelog:
βIn Freeciv you compete against several opponents to found cities, use them to support a military and economy, and finally to complete an empire that survives all encounters with its neighbors to emerge victorious. Each opponent may be either another human or be controlled by the computer. All players begin at the dawn of history with a handful of units β typically with an explorer and a couple of settlers in 4000 BC β and race to expand outward from those humble beginnings.β
In this article I will show you how to install FreeCiv 2.4.4 on Ubuntu 14.10 Utopic Unicorn, Ubuntu 14.04 Trusty Tahr, Linux Mint 17.1 Rebecca, Elementary OS 0.3 Freya, Deepin 2014, Peppermint, Pinguy OS 14.04, LXLE 14.04, Linux Lite 2.0 and other derivative systems.
Because it is not available via any repository or PPA, we have to install FreeCiv 2.4.4 from sources. Follow the below instructions exactly, in order to get a successful installation.
Install the dependencies:
$ sudo apt-get install libcurl4-gnutls-dev libgtk-3-dev
Download the FreeCiv archive, extract it and cd into the extracted folder:
$ wget http://softlayer-ams.dl.sourceforge.net/project/freeciv/Freeciv%202.4/2.4.4/freeciv-2.4.4.tar.bz2
$ tar -xjvf freeciv-2.4.4.tar.bz2
$ cd freeciv-2.4.4/
Compile and install:
$ ./configure
$ make
$ sudo make install
Run FreeCiv:
$ freeciv-gtk3