I’d add Hounds of Hendenburgh as well!To add to that…
Waking of Willowby Hall.
Hole in the Oak.
Tomb of the Serpent Kings.
The Stygian Library.
Dark of Hot Springs Island.
Dead Planet and Another Bug Hunt for Mothership.
About half of the DCC RPG modules. Includes, but is not limited to…
Sailors on the Starless Sea. Frozen in Time. Peril on the Purple Planet. People of the Pit. Blades Against Death. The Croaking Fane. Against the Atomic Overlord. Moon Slaves of the Cannibal Kingdom.
Just about anything from Michael Curtis or Harley Stroh.
tenfootpole’s list of “best new school adventures” is solid - not the least because the reviews are an interesting look at what “works” for gameability.