You must travel into the past in search of treasures. You start in the present (1984) and must find a time travel machine or device to start your journey. Each time, you travel further into the past, but each device is only good for one trip. You must continue this process until you find a machine or device to return.
Notes
The game is actually called Timezone Traveler. The title The Time Traveler is from a later modified BASIC boot loader, not the game.