Ask someone what they know about Tron, and odds that if they know it at all, it’s probably because of the light cycle sequence. In it, cyclists create walls of light behind them as they move, trying to trap their opponent and cause them to crash. As it happens, that idea didn’t originate with Disney, but dates back to the 1976 Gremlin arcade game Blockade. And as we’ll see, Blockade would find itself cloned time and again, including by Atari for the VCS with Surround.