I physically own Metroid for the NES. I’ve played it countless of times. But it was at least 20 years since I last played it so when it came to NSO I gave it a spin, it’s now my most played NSO game but I haven’t finished it yet.
But man is Metroid a good game that holds up well.
Now I still remember roughly where to go but I love that the game has no mini map. If you want a map draw one with a pencil on a piece of paper.