Historically, the first clubs started out publishing printed fanzines containing fanfiction and artwork. With the advent of the internet, clubs using online technology such as roleplay via chat or email (PBeM) became popular. Text-based online virtual reality games, primarily MUSH and MUCK variants such as "PernMUSH", have modeled Pern since the early 1990s. In the mid '90s, stringent rules were placed on the creation of new clubs and the governance of existing clubs, resulting in legal action against some fans. For example, no new fan-created MU* games were allowed while the game rights were licensed to Ubisoft for the development of the "Dragon Riders: Chronicles of Pern" computer game (released in 2001).