0 A.D. is an open-source, historical Real-Time Strategy (RTS) game where you have to gather the resources you need to raise a military force and dominate your enemies.
0 A.D. put a strong emphasis on historical accuracy. They plan all their units and buildings based on reconstructions of how the units and the buildings might have looked like in the ancient world. They even name them in the original languages, such as Greek and Latin. But itâ€™s worth remembering that any game should be fun to play, so, in many cases, 0 A.D. prefers playability over historical accuracy.
The game started as a mod of The Age of Empires II, then moved to the independent Pyrogenesis game engine. 0 A.D. development has come ad gone since 2001.
0 A.D. offers a manual, tutorial, structure tree, and history to get you started with the game. The game offers single-player and multiplayer modes. There are numerous settings, including General, Graphics, Sound, and more.
Please note that the game is currently in Alpha, and you might experience bugs, slowdowns, etc. That all said, it's an impressive undertaking, and if you like RTS games, you'll want to try 0 A.D.