[RPG - Nintendo DS] The World Ends With You

The World Ends with You, released in Japan as It's a Wonderful World (すばらしきこのせかい ,Subarashiki Kono Sekai^?, literally "This Wonderful World"), is an action role-playing game developed by Square Enix's Kingdom Hearts team and Jupiter for the Nintendo DS handheld console. Set in the modern-day Shibuya shopping district of Tokyo, The World Ends with You
features a distinctive art style inspired by Shibuya and its youth
culture. Development was inspired by elements of Jupiter's previous
game, Kingdom Hearts: Chain of Memories. It was released in Japan in July 2007, and in PAL regions and North America in April 2008.
In the game, Neku Sakuraba and his allies are forced to participate
in a game that will determine their fate. The battle system uses many
of the unique features of the Nintendo DS, including combat that takes
place on both screens, and attacks performed by certain motions on the
touchscreen or by shouting into the microphone. Elements of Japanese
youth culture, such as fashion, food, and cell phones, are key aspects
of the missions.

The World Ends with You received positive reviews, which
praised the graphics, soundtrack, and integration of gameplay into the
Shibuya setting. The few common complaints were related to the steep
learning curve of the battle system as well as the imprecise
touch-screen controls. In the week of its release, the game was the
second best-selling DS title in Japan, and the top selling DS title in
the US.
Source: Wikipedia