It's kind of amazing how prolific Hudson has become in the months following its brutal demise at the hands of parent company Konami. For the second time in a month, Hudson has updated its TurboGrafx-16 GameBox retro compilation for iOS platforms, this time adding the PC Engine port of Seibu Kaihatsu's Raiden, among other titles.

Raiden, released in arcades in 1990, was a landmark title that bridged the gap between the vertically scrolling shooter genre's primitive beginnings and the modern era. Despite the rarity of disc-based console shoot-'em-up releases stateside, the Raiden series' latest sequel, Raiden IV, and a compilation of the Raiden Fighters subseries were released at retail for the Xbox 360 in North America -- a testament to the franchise's enduring legacy.

Raiden is joined by four other games in the latest GameBox update -- the side-scrolling brawler/platformer Shockman, overhead-view racer Moto Roader, the retitled Wonder Boy III port Dragon's Curse, and Sunsoft's Japanese RPG Out Live, which boasts the confusing subtitle "It's Far a Future on PLANET." Free time-limited trial versions are available for each of the compilation's 31 games; individual titles can be purchased for $2.99 each.