This first chart keeps things simple by charting the origins of D&D and the evolution of D&D, AD&D, and the positioning of some other early developments, up to the debut of Advanced Dungeons & Dragons Second Edition in 1989. Perhaps later I'll take things from 2E through 4E, but the era presented is the real heart of the whole discussion, particularly the split between D&D and AD&D and the contributions of Gygax vs. Arneson.
(via Purple Pawn)
