Most “ancient” board games you find online are chess with new paint. These two aren't. Each takes an old game on its own terms — one reconstructed from the sources, one carried somewhere new — and makes it play in your browser. Free, no account, against a bot or a friend.
The strategy game of Plato's Athens, reconstructed from Homer to Pollux. Surround a piece to take it; trap your opponent to win. Not chess — older, and built up from the evidence.
Play Pessoi →Go's territory and life-and-death, carried into a board of paratroopers and drones. Hold ground, surround, and read the shape of the fight.
Play Hoshi →