This is a Great.
As for the game itself this is pure fun to play, filled with hummer and bloody deaths, the excellent game to get your mind of your girlfriends nagging, or your boyfriends continuous talk about that new tuner part that he just installed in his car, unless you are an happy couple in which case you can buy an additional PSP and additional UMD of Metal Slugs and enjoy the wonders of slugging enemies ever after.