Kaido Battle 2: Chain Reaction (released in PAL regions as Kaido Racer by Konami Europe) is the second game in the Kaido Battle PlayStation 2 spin-off series of Shutokou Battle. It was released on February 26, 2004. The PAL release was released in November 2005. It is best known for not being released in the United States of America. The reason why it was not released in the US is unknown.
In Japan, Famitsu scored Kaido Battle 2: Chain Reaction a 33/40. It sold 91,785 copies in Japan despite its good score.