- Mutants & Masterminds, Freedom City; co-creator of Silver Age Sentinels and Blue Rose David Kenzer - HackMaster; The Kingdoms of Kalamar Katharine Kerr - co-author of Legacy of Blood; contributions to Pendragon Ulrich Kiesow - creator of The Dark Eye J. Robert King - co-author of Aurora's Whole Realms Catalog Mary Kirchoff - co-creator of the Dark Sun setting Adam Koebel - co-author of Dungeon World Jeff Koke - GURPS Vampire: The Masquerade, GURPS Black Ops Rudy Kraft - co-author of Griffin Mountain; other contributions to RuneQuest Charlie Krank - Pavis: Threshold to Danger; Call of Cthulhu card game Mythos Rick Krebs - Gangbusters Heike A. Kubasch - Angmar, HARP Christopher Kubasik - contributions to TORG, Shadowrun and Earthdawn Robert J. Kuntz - co-author of Gods, Demi-Gods & Heroes L David Ladyman - Chill, GURPS The Prisoner Lenard Lakofka - The Secret of Bone Hill, The Assassin's Knot, Deep Dwarven Delve Sage LaTorra - co-author of Dungeon World Robin D. Laws - Feng Shui, HeroQuest, Dying Earth Roleplaying Game, The Esoterrorists and other GUMSHOE games, Hillfolk, The Yellow King Roleplaying Game Jeff R. Leason - co-author of The Hidden Shrine of Tamoachan; contributions to Chill Andrew Leker - Skyrealms of Jorune Paul Lidberg - Duel Ken Lightner - Real-Life Roleplaying Series for the d20 System Nicole Lindroos - contributions to Everway and Unknown Armies Ian Livingstone - Fighting Fantasy gamebooks Kerry Lloyd - co-author of Thieves' Guild; co-founder of Gamelords Steve Long - Dark Champions, Hero System 5th and 6th editions, Star Trek: Deep Space Nine Role Playing Game, Star Trek Roleplaying Game, The Lord of the Rings Roleplaying Game James Lowder - Pulp Cthulhu T. S. Luikart - Adventures in Middle-earth M George MacDonald - co-creator of Champions and the Hero System Mark C. MacKinnon - Big Eyes, Small Mouth, The Sailor Moon Role-Playing Game and Resource Book; co-author of Silver Age Sentinels Jeff Mackintosh - co-author of Silver Age Sentinels Ari Marmell - contributions to Scarred Lands and Vampire: The Masquerade Ian Marsh - Time Lord Stephen R. Marsh - Dungeons & Dragons Expert Set; credited with creation of alignment system for Dungeons & Dragons Julia Martin - co-author of Faiths & Avatars; contributions to Dungeons & Dragons 3rd edition Phil Masters - GURPS Castle Falkenstein, Hellboy Sourcebook and Roleplaying Game; GURPS Discworld (with Terry Pratchett) Colin McComb - co-author of the Birthright Campaign Setting; contributions to