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[Creeperopolis]

Science Fiction Adventures was an American digest-size science fiction magazine, published from 1956 to 1958 by Irwin Stein's Royal Publications as a companion to Infinity Science Fiction, which had been launched in 1955. Larry Shaw was the editor for all 12 issues. Science Fiction Adventures focused on longer fiction than appeared in Infinity; these were often labelled as novels, though they were rarely longer than 20,000 words. Shaw declared in his first editorial that he wanted to bring back a "sense of wonder", and he printed straightforward action-adventure stories. Two other magazines of the period, Imagination and Imaginative Tales, had similar editorial approaches, but science fiction historian Mike Ashley considers that Science Fiction Adventures' fiction was the best of the three. Robert Silverberg was a prolific contributor, under his own name and under the pseudonym "Calvin M. Knox", and he also collaborated with Randall Garrett on two stories in the first issue, under two different pseudonyms. Other well-known writers occasionally appeared, including Harlan Ellison, Cyril M. Kornbluth, Algis Budrys, and Harry Harrison. Ed Emshwiller contributed cover art for nine of the twelve issues, and one of the other three was among John Schoenherr's earliest sales.

The magazine was cancelled because of disappointing sales; the final issue was dated June 1958, and Infinity only lasted a few months longer. A British reprint edition commenced in early 1958, edited by John Carnell; after the American original ceased publication, Carnell kept the magazine going for 32 issues by using reprints from other sources and by printing original material.