The PlayStation 2 (PS2) is a home video game console developed and marketed by Sony Interactive Entertainment. It was first released in Japan on 4 March 2000, in North America on 26 October 2000, in Europe on 24 November 2000, and in Australia on 30 November 2000. It is the successor to the original PlayStation, as well as the second installment in the PlayStation brand of consoles. As a sixth-generation console, it competed with Nintendo's GameCube, Sega's Dreamcast, and Microsoft's Xbox. It is the best-selling video game console of all time, having sold over 155 million units worldwide. Announced in 1999, Sony began developing the console after the immense success of its predecessor. The highlight of the system was its Emotion Engine processor, co-developed by Sony and Toshiba, which was said to be more powerful than personal computers. The PS2 offered backward-compatibility for its predecessor's DualShock controller, as well as its games. The PlayStation 2 received widespread critical acclaim upon release. A total of over 4,000 game titles were released worldwide, with over 1.5 billion copies sold. In 2004, Sony released a smaller, lighter revision of the console known as the PS2 Slim. Even after the release of its successor, the PlayStation 3, it remained popular well into the seventh generation. It continued to be produced until the beginning of 2013 when Sony finally announced that it had been discontinued after over twelve years of production, one of the longest lifespans of any video game console. New games for the console continued to be released until even shortly after the end of its life and support from Sony.
After destroying the bioweapon known as Antares near the end of the first tournament, Shin Ikushima infiltrated the main building of Orion Corporation in an attempt to hunt down the company's CEO, Ranzou Kihara, in order to finish him off right then. However, when he went to the chairman's office, there was no Ranzou, rather, there was only a young girl inside a cryogenic sleep chamber. Shin releases the girl from the chamber and runs off. Realizing that she lacks any memory of her past, Shin decided to adopt the girl, naming her Kei. Ten years later, Kei, under guidance from Shin, grows up to become a beautiful young lady, and an accomplished black belt in Kyokushin karate. Kei still had no memory of her past prior to Shin saving her, but this did not bother her in the slightest. Until one day, Kei encounters a mysterious woman named Eileen A., who claims to be a former employee of Orion. Eileen told Kei about the Orion Corporation and how Ranzou Kihara is the one holding the answers to her past, before eventually departing, leaving Kei with nothing but questions. Several months after that fateful meeting, Orion announces the second Sentoki: Global Martial Arts tournament. Kei, along with her guardian and master Shin, decides to join the tournament to meet Ranzou Kihara and find more about her past.
