Dead or Alive 4 (DOA4) is the fourth game in Team Ninja's famous Dead or Alive series. It was released on December 29, 2005. Itagaki has said that Helena would be the main character of the game, becoming CEO of DOATEC.
- Brad Wong
- * Jann Lee
- Lei Fang
- Ryu Hayabusa
- La Mariposa (who is later discovered as being Lisa from Dead or Alive Xtreme Beach Volleyball.)