Border Zone is an interactive fiction video game written by Marc Blank and published by Infocom in 1987. It was released for MS-DOS, Apple II, Commodore 64, Amiga, Atari ST, and Macintosh. Unlike most other purely text-based games, Border Zone incorporates real-time aspects of gameplay. It is also Infocom’s thirtieth game. Its tagline is “Action and international intrigue behind the iron curtain.”