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Blackburn later joined the Army, and launched both the gaming magazine Shadis and his company Alderac Entertainment Group (named after his AD&D campaign world) while still in the Army. The original Shadis was a black-and-white digest featured gaming articles largely written by Blackburn, and each issue featured several pieces of fiction collectively called the "Alderac Anthonology" which detailed Blackburn's world of Alderac (one of Alderac's moons was Shadis, from which the magazine borrowed its name).:262
He conceived of having a comic strip that became Knights of the Dinner Table (KoDT) in 1990 as part of Shadis: "I had been a great fan of J.D. Webster's Finieous Fingers from the early Dragon Magazine, and I wanted something similar. Unfortunately, I couldn't find anyone willing to do a strip. Finally I sat down and drew out a very crude cartoon showing a gamemaster and a player sitting around a table arguing over a rules call." Blackburn based the KoDT characters on friends and fellow players, and B.A. Felton on himself. Blackburn conceived the cartoon as just filler material, but when he replaced it with more professional strips in one issue of Shadis there was an outcry from fans.:262
Blackburn was a sergeant in the army during Operation: Desert Storm.:262 During the conflict Blackburn helped activate reservists for remedial training prior to deployment. The magazine, Shadis, was not published for a year and a half, but Blackburn got back into the publishing business when he returned in 1992.:262 Alderac published three issues of a KoDT comic book in 1994-1995: "I soon became aware that the demand for KoDT was much higher than I had ever realized. That got me thinking about doing it on a monthly schedule."
Blackburn left Alderac in 1995 because he felt that he and his partners John Zinser and David Seay were looking for success in the CCG industry while he wanted to keep the company fun and small and focus on KoDT.:263 He formed a new company called KODT Enteractive Facktory to publish KoDT monthly.:309 While working at Shadis, Blackburn had made friends with employees of Kenzer & Company: "We discovered that we had so much in common, I decided to come aboard and throw my intellectual properties in the kitty."
Blackburn joined Kenzer in December 1996, and Kenzer published his comic book monthly beginning with a reprint of issue #4.:310 The KoDT comic strip moved to Dragon in issue #226, becoming very popular. "Over the years I've often wondered just what it is that causes all the fuss... I'm the first to look at the typical strip and say, 'It's not all that!'" In 2001, Kenzer published the HackMaster role-playing game, which was based on the fictional game played by the characters in the Knights of the Dinner Table comic strip.:311