You need Metroid 2: Return Of Samus if you're a completist. After all, this Game Boy adventure tells the story of how Samus Aran met the baby Metroid, setting us up for Super Metroid and Metroid: Other M.

It doesn't help that the black and white visuals mean many locations look similar and you may struggle to work out where you have and haven't visited.
However, these monochrome backgrounds do heighten the feeling of bleak isolation for which the Metroid series is famous.
However, once you get to grips with Metroid 2 and have broken through some of the secret passages in the walls, you'll find that it has more to it than most Game Boy titles.
With some great power-ups to collect, including the Space Jump, Plasma Beam and Spider Ball, this is an enjoyable game that isn't just for hardcore fans.

I downloaded this the other week. I'm enjoying it, but the lack of a map made things a bit tricky and I kept backtracking on myself. Printed a map off of the internet to help me get my bearings and I'm enjoying it a lot more!
I will get round to downloading this, but with the all the Chistmas Season games and the 10 GBA Ambassador games, I'll feel like I'm being greedy.
Downloaded this gem a few weeks ago. Despite the lack of map, it still plays well. =)
I reccomend getting the actual cart and playing on a GBA to get the game in colour, even better play it on a Super Game Boy. I love this game though and it is really underrated, hopeful more people will try it since it's out on the eShop though.
I fondly remember borrowing and completing this some 16 years ago!
The lack of a map is a little daunting, but this is a rewarding, yet challenging game.
I recently bought my own original copy of the game and playing this on the Game Cube Player is really fantastic. I'd definitely recommend it in any format though!
Your a poet and you didn't even know it.
someone Please tell me is it harder then Matroid for the NES.