DidYouKnowGaming Edit: This threads has been merged with others
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If the player slashes a sign with their sword, pieces will fly off, if the player feels bad about what they have done, they can repair the sign by playing Zelda's Lullaby near it, once the song is finished, a theme similar to solving a puzzle plays, and the sign magically repairs itself.
In Zelda II: The Adventure of Link, you must travel through a maze of caves which is called "Death Mountain". When you finish with this maze, you emerge into a small rectangular area to the south which has some interesting terrain and no discernible purpose. No dungeons or secret items appear here, except for the caves to the north where you acquire the hammer and the magic potion, which are called "Spectacle Rock" by some townspeople in the game.
Look familiar? Take a look at this overhead view of the map from the first Legend of Zelda game, and see if you notice any similarities:
This small area in Zelda 2 is obviously supposed to be an abbreviation of the map from Zelda 1. The cave in which you acquire the Hammer in Zelda 2 is the same cave where you rescued Zelda in Zelda 1.
It's sort of well known, but it's still cool. I'm going to go through the entire backlog on the forum soon with some friends so I can get a better understanding of what people will find interesting and sort out the submissions.
In the original, and remake of Link's Awakening for the Game Boy if the player makes their characters name Zelda, they get a remixed version of the main theme I believe.
I thought only Marin called you THIEF.
However, it's been a while since I've played the game.
Also, if you go back into the shop, the owner will just shoot you with a laser gun.
ALSO, ALSO, Wart from Super Mario Bros 2/Doki Doki Panic makes a cameo during a trade sequence in that game. This is one of the earliest hints that the player is in a Dream World, as Wart's only other appearance was as the final boss of SMB2, which took place in a dream.