The first game titled "Dynasty Warriors", "Sangokumusō" in Japan, is a fighting game and different from the rest of the series. All English titles are a number ahead of their Japanese counterparts due to the English localization of naming "Shin Sangokumusō", a spin-off of the previously mentioned "Sangokumusō" game, as "Dynasty Warriors 2". As a result of the fact that the original "Sangokumusō" title is a fighting game and has a different series title in Japan, it is not considered a formal entry in the "Dynasty Warriors" series by Koei Tecmo; the series's 20th anniversary is considered to be 2020 to mark two decades since the release of "Dynasty Warriors 2".