FIRST STRONGHOLD is the 2016 FIRST Robotics Competition game. The game is played by two alliances of three teams each, and involves breaching the opponents’ defenses, known as outer works, and capturing their tower by first firing "boulders" at it and then surrounding or scaling the tower using rungs. Points are scored by crossing elements of the tower's outer works, shooting boulders into the opposing tower's five goals in order to lower the tower strength, and by surrounding and scaling the tower.