A Gun for Dinosaur and Other Imaginative Tales is a short story collection by American science fiction and fantasy author L. Sprague de Camp, first published in hardback by Doubleday in 1963, and in paperback by Curtis Books in 1969.

[3] P. Schuyler Miller felt it "must represent just about the last grain spirits to be distilled from the de Campian mash" with "[m]most of the ... stories ... also distinctly late-model de Camp, commenting on the current scene--and especially the suburban, or more properly exurban scene--by projecting it into the future, where its 'things of custom' appear in all their incongruity.

"[4] S. E. Cotts calls the book "a well-deserved tribute to one of science fiction's steadiest and most well-rounded contributors," and the title story "one of my favorites," noting that "[i]ts subject, about a safari into the past, has been successfully tackled by other writers, but this version has solid merit.

"[5] Avram Davidson found the collection "a great disappointment," saying he could no longer enjoy de Camp's shorter work because the author "[t]ime after time ... gets hold of a great idea--and throws it away in playing for laughs of the feeblest conceivable sort."

He deems "Judgment Day" the "sole exception ... it is so authentic-sounding that one could scream.