A staple of the gaming industry, Mark's illustrations have appeared in Whitewolf's "World of Darkness" game line, Isaac Asimov's "History of Ibotics", H. P. Lovecraft's Mythos card game from Chaosium, Holistic Design Inc. Games and Robert E. Howard's "Black Reaper" from Millennium comics. He claims that he is currently teaching ebonics to the voices in his head.