Thexder originally came out in 1985, and has been ported to several different platforms in its lifetime, mostly computers. However, I can say with some confidence that the PSP remake of Game Arts' classic free-scrolling, transforming shmup, called Thexder Neo, is much more enjoyable to play than the retro versions. And people who didn't go to TGS will get to enjoy it soon: Square Enix announced that Thexder Neo will be available worldwide on October 1.