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Guessed by @Ultrashroomz
I think this is probably the most unremarkable Metroid game ever made. As in, it's as standard fare as it gets for the series. Go into the underworld of Zebes, kill big lizard guy and alien dragon, then kill a brain in a jar. I mean, it's a remake of the first game, so it's not wrong in taking this approach, but where the original entry has a very distinct tone and style from the rest of the series, Zero Mission makes the atmosphere more like a light-hearted take on Super Metroid. Which I suppose is pretty defining on its own, since no other Metroid game is anywhere close to being light-hearted. Funny enough, I think it is almost entirely skippable for anyone who wants to just play through the mainline games, because the story feels like it really begins with the second one. This is more just a foundation for what Metroid as a whole is about, a light and easy appetizer before you get into the real stuff, but not really that important of a chapter in any of the franchise's stories.
So because of its relatively upbeat tone, and its near total lack of an actual storyline, this game feels almost like the Mario of Metroid to me. And you know I'm not the biggest fan of Mario. But while I do find Zero Mission significantly less interesting than all the other great Metroid games, it's just because this series has such a ridiculously high standard, seeing how great this game is.
