is a video game series created by Arc System Works. It has sold 1.7 million copies as of August 2012. The game franchise's creator, Toshimichi Mori, left Arc System Works and joined NetEase in September 2022.
The series has the roster with each game releases, with the wave of playable characters from Calamity Trigger and other ones with different personalities in Central Fiction. They made appearances on game crossovers and other associated media.
Two official events, and (contraction of "BlueFestival"), were held in June 2009 and February 2010. It features a variety of posters, artbooks, apparel, and figurines. On February 11, 2017, Arc System Works announced a collaboration with Tecmo Koei's Team Ninja to release an Arc System Works Costume Set, consisting of the costumes of some characters from BlazBlue and Guilty Gear for ' in March 2017.