Border Zone is an interactive fiction video game written by Marc Blank and published by Infocom in 1987. It was released for most popular personal computers of the day, such as the IBM PC, Apple II, and Commodore 64. Unlike most other purely text-based games, however, Border Zone incorporated real-time aspects of gameplay. It is also Infocom's thirtieth game. Its tagline is Action and international intrigue behind the iron curtain.