Warlords III: Reign of Heroes is video game released in 1997, and the third release in the Warlords video game series. In 1998 it was followed by expansion Warlords III: Darklords Rising.

After a four-year hiatus, SSG developed Warlords III: Reign of Heroes.

The game was released for Microsoft Windows and used new system capabilities to dramatically improve graphics:
animated armies' movements
skinnable user interface
several landscape options
more advanced city graphics

The heroes acquired the ability to cast spells to receive the temporary benefit. Each spell has its price expressed in mana points, which became the second (after gold) resource in game.

The campaign system also became more advanced: the heroes from the previous game of the campaign followed the user to the new game, keeping their experience and items.

Another new feature of the Reign of Heroes is the flexible races concept: every player had a number of pre-defined units he was able to produce, and an additional number of units that could join him. This allowed for more consistent storyline in the campaigns and made players' advancement more challenging, as the natural production of the further cities normally wasn't matching the player's race.

Unlike the previous versions Reign of Heroes provided several hero classes. Each class has its own upgrade paths and costs of upgrade options. The upgrade options themselves became user-selectable, giving the player more control over the heroes' development.