X Octagon is a stage that appeared in Dead or Alive 3.
X Octagon is surrounded by a big audience, here to see the matches that go on in the Dead or Alive tournament as a large poster shows that Dead or Alive 3 is being hosted there. The ring is enclosed by electrical fences that act as danger zones. The stage is also very similar to either a Mixed Martial Arts combat arena or an illegal Fighting area.
- The arena is similar to the Urban Jungle in Tekken 5, the arena is surrounded by a big audience that had gone to see a fight.