Curse of the Chthonians is a 1984 role-playing game adventure for Call of Cthulhu published by Chaosium.

Curse of the Chthonians is a package containing four adventure scenarios, "Dark Carnival" by David Hargrave; "The Curse of Chaugnar Faugn" by Bill Barton; and the linked scenarios, "Thoth's Dagger" and "The City Without a Name" by William Hamblin.

[1] Stephen Kyle reviewed Curse of the Chthonians for White Dwarf #59, giving it an overall rating of 9 out of 10, and stated that "All of them are very highly recommended as superb examples of how to design thrilling, well-crafted scenarios.

[1] Allston commented that "I'd recommend you buy Curse of the Chthonians, in spite of its shortcomings.

And Curse is a well-rounded, fast-moving scenario with a healthy helping of period flavor.