One or two players can play on the same computer; online multiplayer is planned for the future. The goal is to kill to opposing king by moving blocking pieces and tilting the board to slide metal balls around. A turn consists of three moves: each player must move and tilt once per turn. If two balls hit a piece, it is removed; three balls are required to kill another ball. The relatively simple rules still allow for strategic depth, making TREBUCHET an intriguing strategy game.