fan disc

A fan disc (sometimes called fandisk or simply abbreviated as FD) is a package of additional content, usually released by a game company after the successful launch of one of its titles. The contents of fan discs varies, but often includes new images, music, minigames and miscellaneous information related to the original game. Sometimes, fan discs will also feature whole new games in order to extend the original title's storyline; however, those are rarely considered true sequels, often depicting events of minor importance to the overreaching plot of the series and being considerably short. Alternatively, it is not uncommon for such games to present "What If" scenarios, retell certain events from the point of view of a different character or transport the main cast to a different setting.