The Legend of Zelda has been around for 25 years. Nintendo's latest instalment in the venerable series proudly trumpets the milestone in the opening credits. There's even an in-game reference to the two-and-a-half decades in the series. In the ever changing medium of video games, 25 years is an eon. The Legend of Zelda series is more a genre of its own than a series. The latest Zelda game, however, has one key feature that sets it apart, Skyward Sword is the last Zelda game that can possibly work under the Ocarina of Time model.