WizardWorks Software is a defunct video game developer and publisher previously located in Minneapolis, MN. Focused on casual consumer games, WizardWorks was best known for publishing the Deer Hunter series of video games developed by Sunstorm Interactive; their series of unofficial fan-made level compilations for Doom, Doom II, Heretic, and Hexen; and multiple series of licensed and authorized add-ons and expansion packs for Duke Nukem 3D and others.
In 1996, WizardWorks was acquired by GT Interactive Software, and was eventually combined with other GT Interactive holdings in Minneapolis to form GT Interactive's Value Products Division. WizardWorks continued as label through a subsequent corporate acquisition by Infogrames which later became Atari.
In 2004, Atari closed the Minneapolis office, folding outstanding projects into the Beverly, MA office.
WizardWorks has often been criticized for creating products of questionable quality. They have also been accused of violating the Doom EULA and Data Utility License by selling Doom modifications without id Software's permission.
John Romero's ex-girlfriend and former Ion Storm designer Stevie "Killcreek" Case was to produce a Quake II expansion episode entitled Vengeance via her startup company Primitive Earthling Games, with WizardWorks as the publisher. Rumors abound that the episode was completed despite never being released.