I knew it would be too obscure.
One of the first text dungeon games was called Adventure. I first ran into it in 1977 (I think -- might have been '78). The player had to wander into and around a great cave, find treasure, and avoid being killed or getting lost. Lots of classic game phrases came from Adventure, such as 'You are in a maze of twisty passages, all alike'.
The game ended when the player got 500 points. A zillion people got to 499, then gave up. That last point was earned when the player carried a copy of Spelunker Today from (I don't remember) to the part of the cave named 'Witt's End'.
Your post title reminded me of the game. You were at wit's end, trying to puzzle out how to get that last point (uhhh PDF).