Puzzle Dungeon: The Seers Sanctum
It's like a 'Legend of Zelda' puzzle dungeon, but instead of Link, you play as a group of grubby grave robbers. Also, there's way more eyeball stuff.
Puzzle Dungeon: The Seers Sanctum is a system neutral adventure for characters of level 1 to 4.
It will work with any old school games like Old School Essentials or B/X or the most recent version of the world's most popular roleplaying game.
What's in it:
* 10 room dungeon crawl where each location has its own mysteries to poke and experiment with
* Cohesive puzzles that build on each other
* Lets players to discover their own solutions in true OSR fashion
* Magic items and equipment that change how the players interact with their environment and previously explored areas
* Use as a 4-6 hour one-shot or the start to a planar hopping campaign for wherever you'd like to go