Dennis Detwiller (born July 12, 1972) is a computer game designer for Hothead Games as well as a role-playing game developer and artist. He was born in New York City, but now resides in the Vancouver, Canada area.
Detwiller was raised in New York with a childhood often described as "stranger than fiction". He began work as an inker for Marvel Comics in the 1990s, and attended School of Visual Arts on Scholarship. He worked for many years as a freelance artist, often using the University Village, Starbucks in Seattle as his studio.
Detwiller was a founding member of Pagan Publishing with John Tynes as art director where he co-created the Origins Award winning Delta Green in 1997 with Tynes and Adam Scott Glancy and illustrated the also Origins Award winning The Hills Rise Wild!.
He is known for his work in the collectible card game Magic: The Gathering, to which he was a regular contributor. He also participated in many other projects at Wizards of the Coast and was a shareholder.
In 2000 he left Pagan Publishing for Hobgoblynn Press with which he created Godlike: Superhero Roleplaying in a World on Fire, 1936-1946, published in 2001. After the release of Godlike in 2002 Detwiller founded Arc Dream Publishing with Shane Ivey. He has since worked on Godlike's follow up Wild Talents and the free horror setting game NEMESIS since then.
In 2002 he left Seattle for Vancouver to work with Radical Entertainment where he helped develop The Incredible Hulk: Ultimate Destruction and Scarface: The World is Yours. In early 2009, he left Radical Entertainment for Hothead Games.