Emperus: A 4X Dynasty Civ Strategy Game Where You Play as Your Favorite Culture on Desktop or Phone

Emperus is an online 4X dynasty strategy game for mobile and desktop in which players build a dynasty of their favorite ancient or medieval culture and try to conquer the known world. Each game takes about an hour, and the dynasty persists across games as long as it survives, letting players grow massive family trees. The game is completely free to play.