Temple of the Frog

A very nice coverage of the backstory behind the design of Dave Arneson's "Temple of the Frog" scenario in OD&D Supplement II, Blackmoor. I must admit: The first time I read it I was similarly surprised and agog.

Why the Temple of the Frog, Dungeons & Dragons’ first printed dungeon, seemed unplayable

Hat tip: Landon Schurtz.