This is it. Cult classic. THE Metroid. Still a helluva fun to play even after 30 years. Wish I had to play it earlier.

Cult classic which inspired A LOT of indie platformers. As a trailblazer, this game has its cons: obtuse moments, unnecessary difficulty, cryptic way to get the best ending. On the pros, we have quite fast-paced combat, interesting platforming gimmicks, non-trivial bosses and quite unique setting.

The start of the series. Pros: light-hearted collect-a-thon, on the easier side of things; short and fun. Cons; simplistic, sometimes too much; bosses is practically inexistent.