in Pylos, you want to be one who places the final ball on top of the pyramid. Sounds simple enough, right? At the start of the game, each player has fifteen balls, either light or dark, and they take turns placing them on a game board that has sixteen indentations on it in a 4x4 grid. Once four balls have been placed next to one another in a square, a ball can be placed on top of them, forming a second level of play. (boardgamegeek.com)