This is a re-tooling of an adventure published by Goodman Games in 2009 for AD&D 1e, now amended to the Dungeon Crawl Classics ruleset by its original author, Harley Stroh... but the cunning and enjoyable plotline remains unchanged.
The Tower of the Black Pearl is a first-level adventure involving the exploration of a tower only revealed at extremely low tide - something that happens once a decade, so grab your chance while you may. Good background material is provided for the GM along with several hooks to get the characters involved. Once in, it's a neat adventure, challenging without being overwhelming, and nicely time-limited... after all, you go there at extreme low tide!
If the traps and denizens of the Tower themselves and the incoming tide are not enough challenge, a pirate by the name of Savage Quenn also fancies his chances at getting his hands on the Black Pearl and any other treasure he can find.
A good solid adventure with that classic feel.