This episode we’re cracking open the classic B/X and BECMI editions of Dungeons & Dragons, the boxed sets that taught millions how to play. We’ll break down how Moldvay’s Basic rules streamlined OD&D into a clean, accessible framework, why Cook & Marsh’s Expert set expanded the game into wilderness and domain play, and how Mentzer’s BECMI line pushed advancement all the way to level 36 and beyond into Immortal status. From the simplicity of six ability scores and race-as-class, to the structured progression of dungeon → wilderness → dominion → planar → divine play, these editions show D&D at its most modular and pedagogical. We’ll also talk about how combat, spellcasting, and saving throws worked in practice, how the mechanics diverged from AD&D, and why the Rules Cyclopedia remains one of the most complete RPG rulebooks ever made. If you’ve ever wondered how “Basic” D&D built its own identity apart from Advanced, this episode puts the rules under the microscope.