Dead or Alive 2 is a fighting game in the Dead or Alive series, developed by Team Ninja and published by Tecmo. It debuted in arcades in 1999 and was later ported for the Dreamcast and the PlayStation 2 in 2000. Several enhanced editions of the game were released, including the updates Dead or Alive 2 Hardcore and Dead or Alive 2 Hard*Core. Dead or Alive 2 improved upon the graphics engine of its predecessor by using Sega NAOMI hardware and on the gameplay system by including many new features, leading to critical acclaim and strong sales. In 2004, DOA2 was remade for the Xbox as part of Dead or Alive Ultimate.