Career
Dennis Detwiller started volunteering at Pagan Publishing after seeing an issue of The Unspeakable Oath magazine in 1991 and talking to John Scott Tynes. : 244 Tynes moved the company to Seattle in the mid-1990s, and Detwiller agreed to move there as well. : 245 Detwiller worked at Pagan as art director where he co-created the Origins Award-winning game Delta Green in 1997 with Tynes and Adam Scott Glancy; Detwiller wrote a series of three chapbooks (1998–2000), and with Tynes and Glancy he expanded the setting in 1999 with Delta Green: Countdown. : 246–247 Detwiller illustrated The Hills Rise Wild!, which also won an Origins Award.
Detwiller and Greg Stolze prepared their game Godlike which was intended to be published by Pagan Publishing, but as publication by Pagan was slowing down, Detwiller instead took it to his friends Hsin Chen and Aron Anderson, who created the company Hawthorn Hobgoblynn Press (later known as EOS Press) in 2001 to publish the game. : 249 After the release of Godlike in 2002 Detwiller founded Arc Dream Publishing with Shane Ivey. Detwiller and Ivey formed Arc Dream Publishing to produce supplements for Godlike, and in 2003 Arc Dream acquired the licensing from Stolze to use his One-Roll Engine (ORE) dice system for Godlike. : 250 He has since worked on Wild Talents, a follow-up to Godlike, and the free horror game NEMESIS. Detwiller and Ivey wrote Delta Green: Targets of Opportunity (2010) and also brought back The Unspeakable Oath in 2010. : 250 Following a successful kickstarter campaign, Arc Dream publishing announced a new Delta Green game to be released in 2016.
In 2002, he left Seattle for Vancouver to work with Radical Entertainment where he helped develop The Incredible Hulk: Ultimate Destruction, Scarface: The World is Yours and Prototype. In early 2009, he left Radical Entertainment for Hothead Games. In January 2016, he moved to Monte Cook Games as managing editor.