Career
Mark C. MacKinnon wanted to create a general anime role-playing game system, to have the kind of game that he would like to run, so he formed Guardians of Order to publish his anime role-playing game. : 335 MacKinnon got the name "Guardians of Order" from one of his characters from an Amber Diceless Roleplaying game run by Jesse Scoble. : 335 Guardians of Order released the Big Eyes, Small Mouth (1997) anime game created by MacKinnon at Gen Con 30. : 335 With the success of BESM, MacKinnon wanted to try a licensed property and obtained the rights for Sailor Moon in January 1998 and used most of that year to design The Sailor Moon Role-Playing Game and Resource Book (1998). : 335 MacKinnon hired David L. Pulver to work for Guardians of Order in November 1998. : 335 MacKinnon developed the Sailor Moon Collectible Card Game, which was published by Dart Flipcards. : 336 MacKinnon wanted to grow Guardians of Order in 2000, and started by hiring John R. Phythyon, Jr. : 336 MacKinnon decided in 2002 that Guardians would need to publish using the d20 System to stay in business, so MacKinnon, Jeff Mackintosh and Jesse Scoble wrote the superhero role-playing game Silver Age Sentinels (2002) with Steve Kenson and developed by Lucien Soulban. : 337 Guardians began having financial problems after the d20 crash in 2003, and on January 3, 2005, MacKinnon announced that the company had multiple problems resulting in Guardians being downsized to only himself. : 338 George R.R. Martin announced the end of Guardians of Order on July 28, 2006, which MacKinnon publicly confirmed on August 1. : 339 MacKinnon ultimately left the game industry and went into real estate sales. : 339
In 2013, MacKinnon founded Dyskami Publishing Company and returned to game publishing with a Kickstarter for the board game Upon a Fable. MacKinnon later published under Dyskami additional original board games and other licensed tabletop games based on the Sailor Moon Crystal Japanese anime series.
In 2014, MacKinnon was elected as Ward 6 Councillor for Guelph City Council for a four-year term. He was re-elected in 2018.
June 2019, MacKinnon announced the return of BESM for a Fourth Edition under Dyskami Publishing Company. MacKinnon served as the primary author for the new edition.