Raiden II was a breakout game for creator Seibu Kaihatsu, and Raiden DX is essentially an extended remix of its big hit, adding a variety of new levels and challenges while retaining the original's core concept, gameplay and visuals. The new content consists of three game modes: an Alpha course considered a "training" level that gauges your overall skill, a Bravo course that recaps the first five levels of Raiden II, and a Charlie course that remixes the entire game with new levels and enemy types. Overall, Raiden DX brings more of what makes Raiden II a great middle ground in the shmup world, a sophisticated shooter that is challenging without putting players through (bullet) hell.