Jeffrey Tunnell is a computer game producer, programmer and designer.
In 1984 he founded Dynamix with Damon Slye in Eugene, Oregon.
In 1990, Tunnell left Dynamix to start Jeff Tunnell Productions. Tunnell would go on to create famous brands such as The Incredible Machine, Trophy Bass, and the 3-D Ultra Pinball series while at Jeff Tunnell Productions. These products were some of the most successful retail products to be published by Dynamix.
In 1993, Sid & Al's Incredible Toons earned Tunnell and Chris Cole a patent for the game's concepts.
In 1995, Tunnell returned to Dynamix in a leadership role.
In 2001, after Dynamix was disbanded, Tunnell co-founded GarageGames, an independent video game publisher, which is also the developer of the Torque Game Engine.
In 2007, GarageGames was acquired by InterActiveCorp, the media conglomerate founded by Barry Diller. Tunnell remained on as Chief Creative Officer of GarageGames. Tunnell was a contributor behind the vision of the original InstantAction distribution platform.