 Designed to compete with DC Comics' successful launches "House of Mystery" and "House of Secrets", "Chamber of Darkness", like its companion comic "Tower of Shadows", sold poorly despite its selected roster of creators.After its first few issues, the title, published bimonthly, began including reprints of "pre-superhero Marvel" monster stories and other SF/fantasy tales from Marvel's 1950s and early 1960s predecessor, Atlas Comics.The anthology, in addition to running original stories, also included writer Roy Thomas' and penciler Don Heck's loose adaptation of Edgar Allan Poe's "The Masque of the Red Death", as "The Day of the Red Death", in issue #2 (Dec. 1969).