The Datestones of Ryn is a role-playing video game released in 1979 for the Apple II, Commodore PET, and TRS-80 by Automated Simulations (later Epyx). The Datestones of Ryn was the second title in the Dunjonquest series, but was actually a prequel to the first game, Temple of Apshai. Like its predecessor, this game was written in BASIC. An Atari 8-bit family port programmed by Aric Wilmunder was published in 1981.