Another solid entry in the Metroid series and a suitable follow up to Super Metroid. While there were plenty of new enemies, environments and sectors to explore, this game may have taken a little too much from Super Metroid in that it doesn't introduce any new weapons/abilities or mechanics. Collecting upgrades and health/ammo is slightly different in that Samus absorbs the X parasites but it really is just the same thing as receiving an upgrade from a Chozo statue. The navigation room concept was actually a pleasant surprise and served as a way to wrap a bit of a narrative plot into the game. Samus' inner dialogue when riding on elevators and in the ending sequence of the game also adds to the story and her character development. The classic Metroid feel is all there in this game, and it is still incredibly good despite not really inventing anything new for the series. Definitely check it out if you enjoyed Super Metroid.