Cross-Platform RTS Game 0 A.D. Alpha 21 Available For Download

0 A.D., a free, open source historical war and economy game has reached alpha 21. The new release includes new maps, new game modes, as well as the official introduction of the Seleucid Empire. The game is still considered in alpha because some features are still missing. However, the game is playable, and it features great graphics and sound, as well as a powerful map editor.