After releasing a port of Ketsui for Xbox 360, Mages/5pb made an original vertical scrolling shoot ’em up called Bullet Soul. Looks like that game is turning into a series. Mages announced Bullet Soul: Infinite Burst (temporary title) which is slated for release in 2014 on Xbox 360. No details about the game have been announced at this time.
While Bullet Soul was never released overseas, it was a region free game. Hopefully, Bullet Soul: Infinite Burst will be region free too.