The first original title in SNK's long-running shooter series to hit the PSP, Metal Slug XX was designed with an emphasis on fast-paced arcade action, multiplayer functionality, and replay value. Gamers choose from six familiar characters (including two from the King of Fighters universe), and then blast their way through seven bullet-riddled levels full of enemies, obstacles, and massive bosses. Alternate paths and three difficulty levels are provided to increase replay value, multiplayer fans can join a friend for local co-op action, and those looking for a truly hardcore challenge can take on 70 unlockable "Combat School" missions.