Which published scenarios use Cthulhu himself?

Question

Cthulhu seems difficult to use in scenarios: not least because, according to Lovecraft's story, it takes a ship to kill him.

Which published scenarios feature Cthulhu prominently? I'm mainly interested in Call of Cthulhu scenarios. (I would be interested in Trail scenarios, but I'm fairly sure there aren't any, although correct me if I'm wrong.)

I'm definitely not interested in scenarios that use Cthulhu in a parodic way. For example, if there's a Paranoia adventure featuring a Cthulhu-like creature, I don't need to know.

Give me some details about how Cthulhu is used. Can he be killed? If so, how? Does he affect the Investigator's dreams? Tell me especially how the elements from the original story (sculpture, dreams, New Orleans swamps) make an appearance.

I'm also interested in any scenarios that use the white polypous thing in the lake, particularly if they have an explanation for what it is.

Answer 1

The classic Call of Cthulhu campaign "Shadows of Yog-Sothoth" prominently features Cthulhu in the last scenario...R'Lyeh rises and the characters can actually face off against the Big C himself (and die horribly, of course). This was first released in the early 80s but has been reprinted since then.

It's been a long time since I ran/read this campaign, but some of the scenarios seem to parallel classic Lovecraft stories. Basically, by the last scenario Ryleh is risen and Cthulhu awake, but the characters have a chance to send the isle back down to the ocean floor by their actions (I believe some sort of elder sign is involved, but as I said it's been a long time). Doesn't hold up as well almost 30 years later but it's still a good read and can give lots of inspiration.