Seven Kingdoms: Ancient Adversaries

Seven Kingdoms: Ancient Adversaries is a real-time strategy game principally focused on combat where the players can select one of the seven available cultures to participate in a war of epic scale: facing off are the Japanese, Chinese, Mayans, Persians, Vikings, Greeks, and Normans.

Unlike many other real-time strategy games, Seven Kingdoms: Ancient Adversaries doesn't place undue emphasis on resource management, minimizing much of this very workaday segment. In its place, all sights are trained on combat, where the game really shines – when dozens of units are clashing simultaneously on the screen.

That said, it's not all war in Seven Kingdoms: Ancient Adversaries, since you can also initiate various diplomatic gambits with other cultures, such as making goodwill treaties, buying and selling food, exchanging technology, or even forming alliances to battle other, more powerful enemies. The possibilities are quite broad.

Seven Kingdoms: Ancient Adversaries is an excellent strategy game that in spite of having been commercially released at the end of the nineties became free and open-source in the year 2009.