Dead or Alive 4

Dead or Alive 4 is a 2005 fighting game developed by Team Ninja and published by Tecmo for the Xbox 360. It is the fourth main entry in the Dead or Alive fighting series following Dead or Alive 3 (2001), the last directed by Tomonobu Itagaki before his departure from Tecmo and its merger with Koei into Koei Tecmo in 2009.

The story focuses on the continuing war between the Mugen Tenshin Ninja Clan and DOATEC, and Helena Douglas taking over the mantle of DOATEC as its new president, determined to fight against the corruption within the enormous organization. The story mode introduces the players to new characters and opponents via combat which can then be played in the other modes. New features are introduced in the gameplay and the online mode.

Dead or Alive 4 was generally well received with positive reviews scoring 85/100 on both Metacritic and GameRankings. By mid-2006, it had sold over 1 million copies worldwide. In 2021, Dead or Alive 4 became available on Xbox One and Xbox Series X/S through backward compatibility. It was followed by Dead or Alive: Dimensions in 2011 and Dead or Alive 5 in 2012.