Gunslinger Stratos (ガンスリンガー ストラトス Gansuringā Sutoratosu) is a series of third-person shooter video games developed by Byking (under Taito) and published by Square Enix, that debuted in arcades on July 12, 2012, with the scenario provided by Norimitsu Kaihō (from Nitroplus) based on a concept by Gen Urobuchi. It uses Silicon Studio's Orochi game engine, and runs on the Taito Type X³ arcade system board.