This game is incredible and I'm not just saying that because I'm a Metroid fan.The gameplay is superb blasting enemies,scanning objects and solving puzzles.Graphics for a game that came out five years ago they match or even exceed recently released games.Sound from the screeches of native creatures to the whoosh of the missile and the general area music this games sound just feels right.Replay value since this game may take awhile to complete some people may wish to wait between beating it and playing through it again.The reason I gave it best in series is that you don't have to worry about beam ammunition like in the second prime which makes this game a bit easier so it is a must have.