The story of the game falls in line with the movie Terminator 2: Judgment Day: to save the leader of the Human Resistance, John Connor, and his mother Sarah from the T-1000, a mimetic poly-alloy Terminator, bent on killing them both. The player takes the role of a T-800 Terminator cyborg, already captured and reprogrammed by the human resistance, and fights alongside them against Skynet in the year 2029. Eventually, the T-800 and John Connor penetrate Skynet's headquarters and destroy the system CPU. Discovering the time displacement equipment, the T-800 is sent back through time to John's childhood, with the mission to protect him from the T-1000 that Skynet has already sent back. In the past, John, Sarah, and the T-800 launch an attack on Cyberdyne Systems in order to prevent the development and creation of Skynet. The T-1000 catches up to the group and pursues them in a police helicopter and a liquid nitrogen truck. The T-800 is able to freeze and shatter the T-1000 with the liquid nitrogen, but it quickly melts and reforms in order to continue its pursuit of John. Ultimately, the T-800 must stop the T-1000 from killing John and blast it into a vat of molten steel to destroy it. The amount of equipment destroyed in the Cyberdyne raid determines whether or not the company's research will continue, either averting Judgment Day or allowing the possibility that it can still occur.
Each game uses different controls, most DOS games use the keyboard arrows. Some will use the mouse , "Alt" ,"Enter" and "Space bar".