The Nintendo GameCube is Nintendo's 4th generation home game console. Released in 2001, it represented Nintendo's entry in competition against "sixth-generation" consoles such as Sony's PlayStation 2 and Microsoft's XBOX. Although the GameCube possessed superior graphics to its main rival, the PlayStation 2, it lacked the ability to play DVDs. It also tended to skew to a younger audience, with games like Pok??��mon. The Legend of Zelda: The Wind Waker is one such game that was marketed for a younger audience. Released in 2003, this entry was significant for being the first endeavor in the series to use cel shading. Cel-shaded graphics are computer rendered designs that make the images appear as if they were hand drawn. The Wind Waker has a more cartoonish and simplistic appearance as a result. The game is an indirect sequel to The Legend of Zelda: Ocarina of Time, taking place hundreds of years later. After the events of the previous game, where the hero, Link, vanquished the malevolent Ganondorf, water flooded the mythical kingdom of Hyrule. Link must travel through the Great Sea in order to reach new areas in this game as a result. This is the first Zelda entry to have the sea act as an overworld. While initially controversial for its cel-shaded graphics, the game sold over four million copies, making it a monetarily successful additional to the franchise. It was followed by The Legend of Zelda: Twilight Princess (2006), which returned to the more realistic and mature art style made famous by Ocarina of Time.