Heroes of Might and Magic IV is a turn-based strategy game developed by Gus Smedstad through New World Computing and published by the 3DO Company for Microsoft Windows-based personal computers in 2002. A Macintosh port was subsequently developed by Contraband Entertainment and released by the 3DO Company. The fourth installment of the popular Heroes of Might and Magic franchise, it is the sequel to Heroes of Might and Magic III, and was the last to be developed by New World Computing.
Unlike previous games, where they had little active role in combat, heroes became present on the battlefield with their troops. It is possible to have armies with more than one hero, or with no heroes at all, although armies without a hero are incapable of performing certain tasks, such as capturing enemy towns or structures. Both the adventure and combat maps were converted to fixed-view isometric 3D display. The traditional hexagon-based battle grid was converted into a much higher-resolution square-based grid, making it easier to feature units of different sizes.