Kellogg's Promotional Mini-Comic, included in Cereal Boxes circa 1984. Published by Com-Com Promotions. These were published in association with Americom, who produced a series of 10 titles (see below). The art and text boxes match the Americom edition, although the story is abridged, as each edition is only 16 pages.
Batman, Superman, Jonah Hex. If anyone has any others - please get in touch.