is a compilation fighting game developed by Team Ninja and released by Tecmo for the Xbox in 2004. It is a collection of the two previous games in the series, 1996's Dead or Alive and 1999's Dead or Alive 2. It marks the first game in the series to be a compilation. DOA Ultimate contains a high-resolution edition of the Sega Saturn version of Dead or Alive, and an enhanced remake of DOA2 which utilizes a new graphics engine and offers Dead or Alive 3 game mechanics, new game content, and the inclusion of Hitomi as a playable character. The game offered online multiplayer capabilities, making the compilation among the first fighting games to offer online play. On December 16, 2006, both games became backwards compatible with the Xbox 360. On November 10, 2021, both games were made available to download on Xbox Live worldwide. On November 15, 2021, both games were added to the list of backward compatible games for the Xbox One and Xbox Series X/S. Gameplay Dead or Alive Ultimate is a compilation game that includes a remade version of Dead or Alive 2, with re-developed graphics and new stages for the Xbox gaming system. It also includes the original Sega Saturn version of the first Dead or Alive, with smoothed graphics, but lacks the additional content received in the later-released North American PlayStation version (no Bass or Ayane characters or extra costumes). Both editions include online play. Dead or Alive 1 Ultimate is essentially identical to its original Sega Saturn version, and is generally considered more of a collector's disc than for its content. Dead or Alive 2 Ultimate, being a remake created after the debut of Dead or Alive 3, takes elements and mechanics from both its original iteration and successor. The action of 3D-axis movement is as free-formatted as DOA3, and Hitomi is now a playable character albeit outside story mode. Other elements have been kept intact from DOA2. These include higher damaging counters than in DOA3, environmental hazards not warranting a knockout on a character, and a counter mechanism that is much harder to execute. Despite being able to freely move on a 3D axis in the Ultimate version of DOA2 however, most moves cannot be sidestepped as in DOA3 and other 3D fighters. Another major change is in the revamped holding system in DOA2 Ultimate. The final major set of changes instituted