Robots is often referred to as the beginning of the arena shooter-a term used to describe a top-down shoot ’em up game with the action locked into a limited area similar to an arena. There were derivatives of the Robots concept, but the overall idea of escaping from hoards of enemies in an enclosed area remained the same and the game was perfect for the low-spec computers of the time. Before long, it was inevitable that it would evolve into something faster-and in real time. In 1980, Stern Electronics introduced the world to Berserk.