Rise and Fall: Civilizations at War is a real time strategy game set in the first millenium B.C. in which players control either Persia, Greece, Egypt or Rome as they try to conquer the know world. The game includes close to 100 unique units, two single player campaigns and a multiplayer component. In late 2008 Midway released Rise and Fall Civilizations at War as an ad supported game which means it's free to download and play. The full version of the game can be downloaded from any of the sites listed below.