From c|net News.com: Gary Gygax, 1938-2008: Rest in peace, Dungeon Master
Gary Gygax, co-creator of Dungeons & Dragons and one of the fathers of tabletop role-playing games, died on Tuesday at the age of 69. He had suffered from heart problems.
The news was first announced on the message board of Troll Lord Games, the publisher of Gygax's most recent works. It has since been directly confirmed by the company, which will post an announcement on its Web site later Tuesday.
Gygax was best known for helping create Dungeons & Dragons and Advanced Dungeons & Dragons. He also pioneered tabletop role-playing games. The first D&D rulebooks were released in 1974 by TSR, and since then have produced three full-fledged sequels, numerous revisions and updates, and dozens upon dozens of additional rulebooks, settings, and campaigns. While Gygax hadn't had much direct involvement with D&D for many years, he developed and contributed to many role-playing games, including Troll Lord Games' Gary Gygax's Fantasy Worlds.