He began authoring and designing game systems in the early 1990s and is well known for his work with the "Over the Edge", "Feng Shui", "Hero Wars", and "Dying Earth" RPGs. He also contributed to a few of the Last Unicorn Games Star Trek roleplaying game sourcebooks. He has written or co-written six novels to date, including "The Freedom Phalanx" in 2006, three books in the Angelika Fleischer series for the Black Library's Warhammer fiction line and "Pierced Heart" in 1996. He also was a contributing editor for Dragon Magazine from mid-2000 through to mid-2002.