"Dynasty Warriors (真・三國無双 Shin Sangokumusō, Shin Sangokumusou in Japan, literally translated as "True - Unrivaled 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.
Since November 18, 2007, the Dynasty Warriors series has sold more than nine million units worldwide and is Koei's most successful franchise."
Source: Wikipedia, "Dynasty_Warriors", available under the CC-BY-SA License.