<Tr> <Td> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> </Td> </Tr> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> <P> Birth by Sleep is a prequel to the first Kingdom Hearts game, taking place ten years prior . Like the other games in the series, the player progresses through a collection of various worlds, based on various locales from the Disney animated features canon: Dwarf Woodlands from Snow White and the Seven Dwarfs, Enchanted Dominion from Sleeping Beauty, Castle of Dreams from Cinderella, Olympus Coliseum from Hercules, Deep Space from Lilo & Stitch, Neverland from Peter Pan and Mysterious Tower from Fantasia . The game also features various new worlds specially created for the series by Square Enix such as the Land of Departure and Radiant Garden . Disney Town, which is the town that surrounds the castle grounds of Disney Castle, serves as the game's minigame world . Worlds such as Destiny Islands and Castle Oblivion also appear in the form of cutscenes, while the 100 Acre Wood from the Winnie the Pooh franchise, which had appeared in most other games of the series, only appears as a Command Board in Birth by Sleep . The staff first chose the worlds based on the game's scenario, leading to the inclusion of Princesses' worlds . They then added the worlds of Neverland and Deep Space to add variety to the game, while Olympus Coliseum was selected to reflect the game's earlier setting compared to the original Kingdom Hearts . </P> <P> The three main characters are Terra, Aqua and Ventus, a trio of Keyblade apprentices under Master Eraqus, who aspire to become Masters themselves . Another Keyblade Master, Xehanort, and his apprentice, Vanitas, serve as the game's antagonists . Other characters from the previous games return, such as Sora, Riku and Kairi, though they are younger than their original incarnations and given less prominent roles . A number of characters who later come to form Organization XIII also appear in their human forms . As with the Heartless in Kingdom Hearts and the Nobodies in Kingdom Hearts II, Birth by Sleep introduces a new type of enemy: the Unversed, fledgling emotions that are "not well - versed in their own existences" and feed on negativity . </P>

When does kingdom hearts birth by sleep take place
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