The NSP version of Kao the Kangaroo for the Nintendo Switch includes the base game, as well as additional DLC (Downloadable Content). The DLC, which is available as a separate download, adds new levels, characters, and gameplay mechanics to the game.
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Without the update (v1.0.0), the game is borderline unplayable in the water levels. With the update, it is a solid 7/10 platformer. kao the kangaroo rom nsp update dlc switch