Basic Dungeons & Dragons
Blackmoor Greyhawk Hollow World Lendore Isles Mystara Savage Coast
Fantasy Generic / Universal Fantasy (High Fantasy) Action / Adventure (Swashbuckling / Pirates) Action / Adventure (Nautical) Fantasy (Sword & Sorcery) Mythology / Folklore History (Vikings) Science Fiction (Time / Dimension Travel)
Attribute/Stat Based (STR, CON, PER, etc) Class Based (Pilot, Wizard, Scientist, etc) Dice (Various) Level Based (Earn XP and level up) Race Based (Player Race/Species affects gameplay) Random Attribute Generation (during Character Creation)
There were five major editions of the "Basic" (i.e., non-Advanced) Dungeons & Dragons game.
Due to the Old School Renaissance (OSR) Movement and the rise of retroclones, sourcebooks and adventures that were not specifically put out by TSR are now grouped under Basic D&D Compatible Product.