A new version of 0 A.D., open source RTS game based on ancient warfare, has been released. This release has been codenamed Kronos, named after Greek leader, youngest of first generation of Titans. The game is available cross platform and can be installed on Windows, Mac OS, Linux, BSDs etc.
The game features several graphics improvements and new features. Also, a new AI has been added that makes playing single player more fun. Gates have been added in buildings that will allow passages through wall and also control troops movements.
You can download the release from here. Also you can install it in Ubuntu based Oses by adding a PPA.
sudo add-apt-repository ppa:wfg/0ad
sudo apt-get update
sudo apt-get install 0ad