0 A.D. is a free, open-source, historical Real Time Strategy (RTS) game currently under development by Wildfire Games. Developed by Wildfire Games
License: Open Source
Widelands focuses more on economic management and building, whereas 0 A.D. emphasizes combat and historical accuracy. While both games offer multiplayer and modding support, 0 A.D. provides a richer historical context and diverse unit types.