The Metroid series has some of the best games to offer, and Metroid Fusion is definitely one of those games. The game starts when Samus Aran visits a planet filled with X parasites and gets infected by an X parasite. This leads to Samus falling into a coma and surgeons have to surgically remove her suit so Samus did not die of the infection. But then sometime later, the infected suit turns into a mutated X called SA-X so Samus has to stop this threat.
I think that the game is awesome which the platforming, the music, the survival-horror feeling when you are pursued by SA-X, the story-line, the puzzles you have to solve and the challenging boss fights you endure throughout the game.
The negatives would be the finicky Space Jump and the shortness of such a great game.
Other than that, I definitely recommend this game to any Metroid fan who hasn't bought this or anyone who likes this genre of games.