Jonathan Tweet (born 1965) is an American game designer from Rock Island, Illinois who has been involved in the development of the role-playing games Ars Magica, Everway, Over the Edge, Talislanta, the third edition of Dungeons & Dragons and 13th Age, and the Collectible Miniatures Game Dreamblade. He and Mark Rein-Hagen formed Lion Rampant Games in 1987 and co-designed Ars Magica, but Tweet left the company in 1989 before its merger with White Wolf Magazine. He was lead designer for Dungeons & Dragons Third Edition, which became the basis of the d20 system.
Tweet is also the author of Grandmother Fish, a children's book that explains evolution to preschoolers.
White Wolf Credits
Ars Magica Creator
Credit Where It's Due