Border Zone is an interactive fiction video game written by Marc Blank and published by Infocom in 1987. It was released for 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."