Sir-Tech Software, Inc. was a video game developer and publisher based in the United States and Canada.

Sirotech Software published Info Tree, a database management program, Galactic Attack and a beta version of Wizardry: Dungeons of Despair which was later renamed Wizardry: Proving Grounds of the Mad Overlord and formally released in fall 1981.

[1] In spring 1981, Sir-Tech Software, Inc was incorporated as a video game developer and publisher in the United States.

[2] The Canadian counterpart, Sirtech Canada Limited, continued to operate until late 2003.

The third game in the series, Jagged Alliance 2, was still available from its current publisher 15 years after its initial release.