Wizardry: Proving Grounds of the Mad Overlord is the first game in the Wizardry series of role-playing video games. It was developed by Andrew Greenberg and Robert Woodhead. In 1980, Norman Sirotek formed Sir-Tech Software, Inc. and launched a Beta version of the product at the 1980 Boston Computer Convention. The final version of the game was released in 1981.

The game was one of the first Dungeons & Dragons-style role-playing games to be written for computer play, and the first such game to offer color graphics. It was also the first true party-based role-playing video game.

The game eventually ended up as the first of a trilogy that also included Wizardry II: The Knight of Diamonds and Wizardry III: Legacy of Llylgamyn. Proving Grounds needs to be completed in order to create a party that could play in the remainder of the trilogy.