 Set in the doomed future of the original movie. Following a report about suspicious Skynet (the bots) activity John Connor orders you to go to an old missile base. Inside you learn of an old nuclear missile known as "Hades" essentially the most powerful nuclear weapon ever made. Skynet plans to launch the missile against the surviving resistance. You have to run/drive/fly/battle your way through Skynets defenses to the missile launch platform and destroy it launches and the resistance is destroyed.