Gungrave: Overdose
is a PlayStation 2 third-person shooter video game developed by animation studio Ikusabune and published by Red Entertainment in Japan and by Mastiff in North America, and a direct sequel to Gungrave. The game was released on March 4, 2004, in Japan, September 15, 2004, in North America and October 7, 2005, in the PAL regions. Gungrave: Overdose picks up where its predecessor left off, and follows its main character through a variety of stages on a path of revenge. It is the only known title fully developed by animation studio Ikusabune, as the previous title was developed by Red Entertainment.
Two years after the original, Gungrave, and just approaching of that game's anime adaptation, Gungrave: Overdose was released. Preserving Yasuhiro Nightow's flair and artistic style, this outing adds new playable characters to the series and a new story, in which Grave resumes his tale as an unlikely anti-hero tracking down the sadistic son of a Mafia boss who has struck a deal with a symbiotic seed bent on taking over the Earth.