Loaded with classic side-scrolling arcade vehicle combat action, Metal Slug XX signals the rebirth of the 2D run n gun shooter masterpiece. Along with seven stages packed with alternate routes, loads of bad guys, six drivable Slug vehicles and six playable characters from the Metal Slug and King of Fighters franchises, Metal Slug XX also contains the original Main Mission Story mode, a new Combat School ranking system and multi-card two-player co-op gameplay via the PSPs ad-hoc wireless connection.