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.
Near the end of the second tournament, Kei Ikushima, after defeating Regulus in the finals, discovers that the underground laboratory's self-destruct mechanism has been activated. As she was about to make her escape, she would end up crossing paths with Eileen A. once again. Kei tried to escape the lab with Eileen, but she hesitated, instead telling Kei the answer she was looking: Kei was actually the daughter of none other than the CEO of Orion Corporation, Ranzou Kihara. She then gives Kei a letter before telling her to go on and leave the building without her. Kei hesitates at first but soon obliges as the lab eventually explodes, leaving Eileen behind, her fate unknown. Three years after the explosion at the Orion labs, Kei finds out more about her past from the letter Eileen gave her before the incident. She also found out that her DNA was taken for usage in Orion's Perfect Fighter Project, the very same set of experiments that orphaned her adoptive father Shin and ruined the lives of many others. Fast forward to several weeks before Kei’s 20th birthday, several attacks on various martial artists have been reported. All of them perpetrated by people who bore a striking semblance to Kei. As a result, Kei has been blamed for all the attacks, despite having no hand on them. Kei then began to suspect that it had something to do with the Perfect Fighter Project that Eileen had mentioned. Then, on the day of Kei’s 20th birthday, Orion announces the third Sentoki: Global Martial Arts tournament. Kei joins the tournament in order to cleanse her name and find out the truth of it all.
