0 A.D. Alpha 24 Xšay?rš? (Khsha-ya-?sha) is now available for download from Wildfire Games. 0 A.D. is a free and open-source real-time strategy game for Windows, OS X, and Linux. This release cycle of 0.A.D is the longest in the 0 A.D history. It is released under GNU Public License version 2 and CC-BY-SA 3.0. It comes with new building snapping feature, renderer improvement and several new game balancing adjustments.