Originally called Jeff Tunnell Productions, Dynamix was founded by Jeff Tunnell and Damon Slye in Eugene, Oregon USA in 1984. They focused predominantly on games development for the C64 in their early years, culminating in the 1989 release of the very atmospheric action adventure PROJECT FIRESTART. In the mid-1980s they won their first major contract with Electronic Arts, which saw them produce one of the earliest Amiga games in ARCTICFOX. They were given a whopping budget of US$35,000 and developed the game on a pre-release Amiga packaged in a black steel box with a wooden keyboard. The game didn't sell as well as they'd hoped, so they turned their attention back to the C64 and produced a series of action games for EA.
Following work for EA, they produced sports games for Activision and then published games themselves for a short period. In 1990 they were acquired by Sierra, where they produced some of their best games on their own label for the Amiga and PC including RED BARON, A-10 TANK KILLER and THE ADVENTURES OF WILLY BEAMISH. They produced their last Amiga game in 1994 and, thereafter, predominantly developed/published on the PC for Sierra. In 2001, Dynamix was closed as part of an organisational restructure following Vivendi Universal's acquisition of parent company Sierra. Several Dynamix veterans including founder Jeff Tunnell, however, stayed on in Eugene, Oregon and established internet games publisher GarageGames.