Episkyros, also known as ephebeis or harpastum, was an ancient Greek ball game that was similar to both soccer and rugby. It was played in the 5th and 4th centuries BC. The game involved two teams trying to throw or kick a ball over the opposing team's goal line. It was a rough and physically demanding sport, with no rules, and it often became quite chaotic. Episkyros is considered one of the precursors to modern football (soccer) and rugby, and it was a popular sport in ancient Greece.