Time Zone is a multi-disk graphical adventure game written and directed by Roberta Williams for the Apple II. Developed in 1981 and released in 1982 by On-Line Systems (now Sierra Entertainment), the game was shipped with six double sided floppy disks and contained 1,500 areas (screens) to explore along with 39 scenarios to solve. Produced at a time when most games rarely took up more than one side of a floppy, Time Zone is believed to be one of if not the very first game of this magnitude ever released for home computer systems.
The game allowed players to travel through time and solve puzzles while meeting famous historical figures such as Benjamin Franklin, Cleopatra and Julius Caesar.
The screen was a split graphics/text screen. The graphics were done in the Apple's high-resolution format, and the text was four lines at the bottom of the screen. The text described the current scene, including any objects that were in the scene, and allowed the player to type in two-word commands of the form [VERB] [NOUN]; e.g., "GET KEY", similar to that used in text adventure games.