John Alan Martinson has been playing tabletop role-playing games since the early 1990s, primarily as a Shadowrun Game Master. An independent author, game designer, and lifelong enthusiast of fantasy fiction, he spent years developing 👑Kingsmark and its original dice system, ⭐Jack's Cinematic d12 (JCd12) . His ambition was to create a heroic fantasy TTRPG featuring exciting tactical combat, meaningful character development, and realistic consequences without unnecessary mechanical complexity.