0 A.D. - 0.0.17 Alpha - Mac OS X (x64)

0 A.D. is a free, open-source, historical Real Time Strategy (RTS) game currently under development by Wildfire Games, a global group of volunteer game developers. As the leader of an ancient civilization, you must gather the resources you need to raise a military force and dominate your enemies.

Wildfire Games, an international group of volunteer game developers, proudly announces the release of “0 A.D. Alpha 17 Quercus”, the seventeenth alpha version of 0 A.D., a free, open-source game of ancient warfare. This alpha features a major gameplay rebalance, units on walls, trigger support, improved mod support and more!

Official site: http://play0ad.com/

System Requirements:

Operating System Version: 10.5+
Screen resolution: 1024×768 or above
REQUIRES 64-bit INTEL CHIP