(Jyri Jokinen, 27.08.2006 - 00:00) Gradius Collection is a compilation of five beloved games in the Gradius series available for the first time on the PSP™ system. Spanning more than 20 years, the five games Gradius, Gradius II, Gradius III, Gradius IV, and the long awaited Gradius Gaiden, deliver hours of classic 2D shooting action on the go. In the Gallery Mode where gamers can listen to the pumping music from each title and view movies and trailers from some of the original releases.