Probably my favorite Metroid. Though the original trilogy outdoes this one in both atmosphere and the exploration side of things, I find Zero Mission infinitely replayable and probably the most palatable of the series for a single-day run through. I want to give Super my full attention when it's on, and Metroid II is so oppressive that I feel like to casually sit down with it sort of doesn't allow it to breathe. Zero Mission strays on the easy side of things but it's sheer fun to go through while you're there. Incredibly well paced, showing off new ideas every beat of its ~3 hour runtime. And the original game is there as a bonus - which should be the standard for remakes like this. Not a replacement for the original, but a bold re-imagining that strikes a different, but well-deserved chord.