Classic Game Room HD reviews METAL SLUG XX for Sony PSP from Atlus. Basically the same game as Metal Slug 7 for the Nintendo DS, Metal Slug DOUBLE X brings you action on the PSP. It does have an ad-hoc multiplayer feature, but other than that it's pretty darned similar. Made by SNK / Playmore and gushing with 2D side scrolling action packed goodness, Metal Slug XX dazzles players with a dizzying array of enemies and creative environments. Encounter end bosses that crush and mangle you as well as a variety of "Slugs" like the Camel Slug. This CGR review of Metal Slug XX on Sony PSP has gameplay from Metal Slug XX showing 2D run and gun game play in action. UPC 730865600120