|Born||1965 (age 56–57)|
Rock Island, Illinois, U.S.
|Alma mater||St. Olaf College|
|Occupation||Game designer, author, blogger, writer|
|Spouse(s)||Tracy (d. 2008)|
Jonathan Tweet (born 1965) is an American game designer 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. In 2015 Tweet released Grandmother Fish, a full-color, full-sized book about evolution aimed at preschoolers. In 2018 Tweet released Clades and Clades Prehistoric, two card games for children and adults which demonstrate the concept of a clade.
Native to Rock Island, Illinois, Tweet is the son of Roald Tweet, an Augustana College professor emeritus and local historian, and Margaret Tweet. Jonathan Tweet started playing D&D in the 1970s, when his father gave him his first Dungeons & Dragons game. He then formed his own gaming group by recruiting classmates. Tweet graduated from Rock Island High School class valedictorian in 1983. He majored in psychology and sociology at his parents' alma mater, St. Olaf College in Minnesota.
Jonathan Tweet and Mark Rein-Hagen founded Lion Rampant in 1987 while students at St. Olaf College. There, they also met Lisa Stevens who later joined the company.: 232 His article "Egyptian Magic for Call of Cthulhu" appeared in Different Worlds #47 (Fall 1987), the magazine's final issue.: 84 In 1987, Tweet and Rein-Hagen designed the game Ars Magica, a game centered around wizards in the Middle Ages.: 232–233 Tweet left Lion Rampant and the RPG industry in 1989 to start a new career.: 234 Tweet wrote Festival of the Damned (1991), an adventure published by Atlas Games for Ars Magica.: 252 Tweet continued to run a game for a group in Rock Island, Illinois, and wrote about the game "Al Amarja" in Alarums and Excursions; when John Nephew saw these A&E articles he wanted to publish the game, and the result was Over the Edge (1992), the first original game from Atlas Games.: 253 His design on Over the Edge notably involved free-form rules and a subjective approach. Lisa Stevens suggested that Tweet revise the Talislanta rules for Wizards of the Coast and write its first new adventure; this resulted in a revision of the Talislanta Guidebook (1992), which was soon followed by his adventure The Scent of the Beast (1992).: 277 Tweet wrote the adventure Apocalypse (1993) for Mayfair Games' Role Aids line.: 169 Nephew and Tweet also designed On the Edge (1994), a collectible card game based on Over the Edge.: 253 Tweet became a full-time employee of Wizards of the Coast in June 1994, and heralded in new lines from Wizards, the first of which was Ars Magica, recently acquired at Tweet's suggestion.: 279 Tweet designed Everway, which was first published by Wizards of the Coast in 1995.: 254, 280 After Wizards of the Coast moved away from role-playing games, Tweet worked on Portal, a Magic: The Gathering set designed to help new players learn the game.
Tweet was lead designer on the third edition of Dungeons & Dragons.: 286  Tweet, Monte Cook, and Skip Williams all contributed to the 3rd edition Player's Handbook, Dungeon Master's Guide, and Monster Manual, and then each designer wrote one of the books based on those contributions. Tweet oversaw the team designing the Chainmail Miniatures Game, while Skaff Elias did the main design work and Chris Pramas designed the world.: 289 Tweet became the head of the miniatures group, and the Dungeons & Dragons Miniatures Game (2003) was primarily the work of Tweet, Rob Heinsoo, and Skaff Elias.: 292 On December 2, 2008, Tweet was laid off from Wizards of the Coast.
In 2015 Tweet published Grandmother Fish, a Kickstarter-funded book described as "the first book to teach evolution to preschoolers". While criticized by creationist organizations, it has been praised by science educators.
In 2018 Tweet, along with children's science illustrator Karen Lewis, released two card games, Clades and Clades Prehistoric. These animal matching games are intended to be used as tools to teach about evolution. Clades Solo, an app version that includes both prehistoric and modern animals, was released in 2019
The third edition of Over the Edge, with a new setting and new rules, was released June 1, 2019.
An atheist since grade school, Tweet has devoted much of his personal website to his views on religion, in particular on the historical Jesus. He also blogs about religion on the Secular Sunday School blog.
My plan was to demonstrate hell to be absurd... One Sunday, I screwed up my courage and announced to the teacher, "I don't believe in Hell."
The teacher responded with "I don't either."
With the initial foray against dogma a total failure, I called off the whole assault. Speaking my mind would have to wait for college.— Jonathan Tweet
- The Rock Island Argus. September 30, 1965.
- Turner, Jonathan (June 28, 2014). "RI native raising money for kids' book on evolution". QConline.
- Tweet, Margaret. "Margaret Tweet Birthday". QConline.
- Kenson, Stephen (August 2000). "ProFiles: Jonathan Tweet". Dragon. Renton, Washington: Wizards of the Coast (#274): 10, 12, 14.
- Shannon Appelcline (2011). Designers & Dragons. Mongoose Publishing. ISBN 978-1-907702-58-7.
- "Wizards of the Coast: Player's Handbook Exclusive Preview!".
- "Profiles: Monte Cook". Dragon. Renton, Washington: Wizards of the Coast (#275): 10, 12, 14. September 2000.
- "The Wizards Community". Archived from the original on July 17, 2012.
- "The Wizards Community". Archived from the original on July 8, 2012.
- "Through the Scrying Glass: 13th Age Released". Pelgrane Press.
- "13th Age". rpggeek.com.
- "Grandmother Fish". grandmotherfish.com. Retrieved September 23, 2018.
- Cain, Fraser. "Grandmother Fish – An Evolution Book for Preschoolers". Retrieved July 12, 2015.
- Meikle, Eric. "Granny, What a Big Extended Family You Have!". National Center for Science Education. Retrieved July 12, 2015.
- "Clades & Clades Prehistoric Press Release". grandmotherfish.com. May 7, 2018. Retrieved September 5, 2018.
- "Clades Solo". Ideate Games. Retrieved June 8, 2019.
- Tweet, Jonathan. "Hell and Sunday School". Jonathan Tweet's Personal Blog. Retrieved July 12, 2015.
- Tweet, Jonathan. "jonathantweet.com Religion Hub". Retrieved July 12, 2015.
- Tweet, Jonathan. "jonathantweet.com figment hub". Retrieved July 12, 2015.
- Tweet, Jonathan. "Jesus Mortal". Retrieved July 12, 2015.
- Tweet, Jonathan. "Secular Sunday School". Retrieved November 22, 2016.
- Hell and Sunday School December 2006
- Tweet, Jonathan. "Grandmother Fish ● The Kickstarter Video". Vimeo. Retrieved July 12, 2015.
- "TIES Webinar: Jonathan Tweet, author of Grandmother Fish". Richard Dawkins Foundation for Reason & Science. Richard Dawkins Foundation, Center for Inquiry. Retrieved August 25, 2018.
- "Jonathan Tweet". Pen & Paper. Archived from the original on September 30, 2007. Retrieved June 9, 2013.
- My First Gen Con: Jonathan Tweet
- Is Amazon going to challenge Zynga in social games?
- Wizards: Peter on the Cusp, Part Ten.
- Jonathan Tweet Interview, RPG Review, April 7, 2011. Retrieved June 9, 2013.
- 13th Age – My D & D Next: An interview with Rob Heinsoo, Jonathan Tweet and Lee Moyer, Obskures, December 17, 2012. Retrieved June 9, 2013.
- "13th Age: The New Tabletop Game From The Lead Designers Of 3rd And 4th Edition Dungeons And Dragons", Forbes.com. May 20, 2013. Retrieved June 9, 2013.