The original NES version of Legend of Zelda! I want to (slowly) work through the whole Zelda chronology, barring like, the CDi ones. I've had the NES Zelda games on my 3DS for ages but I always found them difficult to play and pretty bad at telegraphing where I was actually supposed to go.
This time around, I just bit the bullet and used a walkthrough, and collected a whole bunch of power-ups before the first dungeon. And now a couple dungeons in, I'm actually having a lot of fun with it! I even kind of like how completely open it is. I stumbled across the eighth dungeon, took one look at the four-headed bullet-spitting plant thing, and turned right around. But it's cool that I can go there pretty much from the start!
I also played the original Zelda via emulation, but the physical game came with a map that makes the game much more feasible to get through on your own. Once I had that, I was golden.
Yup. I think this is it, but you might find better scans elsewhere. It doesn't tell you everything, but it shows you most of the map and labels the first handful of dungeons. Even knowing where the first dungeon is is such a huge help, because then you get a new checkpoint when you die, and once you beat the dungeon, you get an extra heart container.