"Jet Set Radio Future (often abbreviated JSRF) is a video game developed by Smilebit and published by Sega. It was released on February 25, 2002 in the United States, near the beginning of the Xbox's lifespan. After the game's initial release, it was added alongside Sega GT 2002 onto a single disc and bundled with new Xbox systems.
Similar to the original, it depicts a future Tokyo where freedom of expression is outlawed. The user plays a character in the GG's, a gang of in-line skating graffiti artists who skate around Tokyo covering up rival gangs' graffiti, knocking over Rokkaku police, and dancing to the eclectic soundtrack. The game uses a cel-shaded style of animation, and has been widely acclaimed for its unique music style, detailed art, and gameplay."
Source: Wikipedia, "Jet_Set_Radio_Future," available under the CC-BY-SA License.