Zork was one of the first interactive fiction computer games and a descendant of Colossal Cave Adventure. The first version of Zork was written in 1977–1979.

"Zork" was originally MIT hacker slang for an unfinished program. The creators named the completed game Dungeon, but changed it back to Zork after receiving a trademark violation notice from the publisher of Dungeons & Dragons. Zork has also been adapted to a book series.