Conquer the highways of Japan in intense nighttime street races with Street Supremacy for the PSP, known in Japan as Shutokou Battle. This portable racing game focuses on "SP Battles," where the goal is to deplete your opponent's spirit points by tailgating, pulling ahead, or causing them to collide. Customize a wide variety of licensed Japanese tuner cars, upgrade their performance, and battle rival gangs to control different territories. With its unique battle system and deep car customization, Street Supremacy offers a distinct and engaging portable street racing experience.