Hyborian War is a play-by-mail game published by Reality Simulations, Inc. It takes place during the Hyborian Age in the world of Conan the Barbarian created by Robert E. Howard. The game has been continuously available for worldwide play since its inception in 1985 and has changed little in its overall format. It uses a computer program to adjudicate player orders. Although it relies on postal mail or email and has turnaround times which are relatively long for the digital age of video games, Hyborian War has remained active into the 21st century.