[6] In December 1982, he and artist Brian Bolland began Camelot 3000,[7] a 12 issue limited series that was one of DC Comics' first direct market projects.

[11] Barr wrote every issue of the original series, and its Baxter paper spinoff, The Outsiders[12][13] that did not include Batman and introduced Looker.

[17] Barr introduced the Reaper in Detective Comics #575 (June 1987) and returned to the character in the Batman: Full Circle one-shot in 1991.

“In an over-sized hardcover graphic novel one-shot, writer Mike W. Barr and artist Jerry Bingham introduced a monumental new character into the life of the Dark Knight - Damian Wayne.” [19] This title, and Barr's work on Batman with artist Alan Davis have been cited by Grant Morrison as key inspirations for their own run on the Batman title.

It was also notable as featuring Doc Savage's first-ever team-up with The Shadow, another popular hero of the pulp magazine era and inspiration for Batman.

[4] In May 2010, the Invisible College Press published Barr's science fiction/fantasy novel, Majician/51, about the discoveries of a scientist working at Area 51.