SNK Playmore's Metal Slug franchise has been blowing up arcades and sticking it to consoles for years now. The frenetic, run-and-gun, side-scrolling gameplay along with the tongue-in-cheek humor and brilliant 2-D graphics have made this series a fan favorite. While this makes for a great Quarter-eater, it's not a formula that appeals to everyone on consoles (portable or otherwise); these titles sport little depth, feature grueling difficulty, and can be played through in about an hour. Such is the case with Metal Slug XX (pronounced: Metal Slug Double X). The game has all of the conventions and trademarks fans of the series crave, but it isn't a memorable game anyone outside of the core will have more than a passing interest in.