Do dungeons open without keys?

[GrooseIsLoose]

So here I'm talking about the original Zelda.
Can someone explain me how to do this?

Did I Unlock That Door? in Legend of Zelda, The (NES)

Unlock the first door in level 1 without using a key (3 points), won by 2,074 players - Legend of Zelda, The for NES

retroachievements.org

 

[Spiritual Mask Salesman]

It explains it in the description. Walk into the first dungeon of the game, immedietly walk out, then re-enter, the first locked door should be unlocked via a glitch?

 

[GrooseIsLoose]

I tried it . The door wasn't unlocked and I was killed by snakes. This glitch doesn't work just like the mew glitch. I'm gonna try changing rom.

 

[MapelSerup]

Hmm, it always worked for me. I never usually do it because I like to get the key.

 

[GrooseIsLoose]

Is it necessary that I acquire bomb, show the thing to old woman before I enter the dungeon?

 

[MapelSerup]

No. Just as soon as you enter for the first time, walk out and back in.

 

[thePlinko]

What happens is that there is only one grid that you play on, and when you enter a dungeon the grid just changes itself so that it looks different. Basically when you enter/exit the dungeon you don’t actually go anywhere it just looks like you do.

So when you exit the dungeon you are always going to enter the overworld screen from the top. Since you are effectively in both the overworld and dungeon at the same time the game thinks you entered that specific room of the dungeon from the top, realizes the door is somehow closed and resolves the issue by opening the door for you.

Basically just enter the dungeon, immediately leave the dungeon, and immediately enter the dungeon again and it should work.

 

[Mellow Ezlo]

If it doesn't work for you, it might be an issue with the ROM. If you (legally) ripped it yourself from a legitimate version of the game, it should work fine. However if the ROM was (illegally) downloaded from the internet it may be modified/patched. It's worked on all the legitimate copies of the game I've ever played, so if you have one I don't see a reason why it shouldn't work.

Don't download ROMs kids, it's illegal and they could be modified.