Alternate Reality (AR) is an unfinished computer role-playing game (RPG) series that has achieved cult status among many fans of RPGs. It was created by Philip Price, who formed a development company called Paradise Programming. Published by Datasoft AR: The City was released in 1985 and AR: The Dungeon was released in 1987. Price was unable to complete the second game in the series, so The Dungeon was actually finished by Ken Jordan and Dan Pinal. Gary Gilbertson created the music for both games.

Source: Wikipedia, "Alternate Reality (series)," available under the CC-BY-SA License.