Mean Hamster Software, Inc. is a video game developer founded by John Swiderski in 1985. Mean Hamster Software created several games for the Atari 5200 from 1999-2004. They then created Myst for Windows Mobile in 2005, and after the release of Riven: The Sequel to Myst for Pocket PC in 2006, Mean Hamster began work on its first casual games. The company is located in Deer Park, Washington (just outside Spokane, WA). In 2006, Mean Hamster Software acquired the rights to the Exidy catalog, which includes titles such as Crossbow, Venture and Mouse Trap.