Gauntlet is a D&D simulator of sorts. You chose between Warrior, Valkyrie, Wizard and Elf to navigate the Gauntlet, collect treasure, slay wicked monsters, and save your beloved peasant hometown.
Walktroughs for this game estimates the completion time to several hours when playing normally. Here we see the game completed in only 13 minutes! Usually you have to collect clues for the password to the last dungeon - but there is only a limited amount of possible codes and one is picked when you start the game, so you can skip them. There are also some collision detection abuse and lots of luck manipulating.
There is a huge amount of secrets and hidden paths to take in this game, which must be planned ahead. The author recommends the FAQ by melvinwang on GameFAQs.
The author is already working on an improved version.