The Datestones of Ryn is a role-playing video game (RPG) from Epyx. The game was first released in 1979 under their original Automated Simulations company name. 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. The Datestones of Ryn was released for the Apple II, Commodore PET, and TRS-80 in 1979, with an Atari 8-bit family port programmed by Aric Wilmunder published in 1981.