Black Lagoon: Roberta's Blood Trail is the third anime adaptation based on Rei Hiroe's action manga. Studio Madhouse is once again producing it, only this time as a 5-episode OVA series for Blu-ray and DVD, releasing between July 2010 and June 2011. The new story marks the return of former guerrilla assassin Roberta to the fictional criminal's city of Roanapur, Thailand. Black Lagoon is known for its hard-boiled storytelling, clever dialogue and its ultra-violent and stylized gun fight sequences, often compared to Hong Kong noirs and Hollywood action films.