Dynasty Warriors (真・三國無双 Shin Sangokumusō?, Shin Sangokumusou in Japan, literally translated as "True - Unrivaled in the Three Kingdoms") is a series of tactical action video games created by Omega Force and Koei. The award-winning series is a spin-off of Koei's turn-based strategy Romance of the Three Kingdoms series, based loosely around the Chinese classical novel of the same name.
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.
It is Koei's most successful franchise. Including its many spin-offs, 18 million copies of the Dynasty Warriors series have sold worldwide by 2011.