GemStone originally operated with a license to use the Rolemaster game mechanics and Shadow World environment from Iron Crown Enterprises (ICE). In 1995, Simutronics and ICE agreed to let the business relationship expire, necessitating the removal of all ICE intellectual property from GemStone. Many of the game changes were simply renaming ICE names, such as changing the world name from Kulthea to Elanthia, and renaming the deities while keeping their previous characteristics.
