Myth: The Fallen Lords is a 1997 real-time tactics video game developed by Bungie for Windows and Mac OS. Released in November 1997 in North America and in February 1998 in Europe, the game was published by Bungie in North America and by Eidos Interactive in Europe. At the time, Bungie was known primarily as developers of Mac games, and The Fallen Lords was the first game they had developed and released simultaneously for both PC and Mac. It is the first game in the Myth series, which also includes a sequel, Myth II: Soulblighter, set sixty years after the events of the first game, also developed by Bungie, and a prequel, Myth III: The Wolf Age, set one thousand years prior to the events depicted in The Fallen Lords, and developed by MumboJumbo.

Real-time tactics (RTT) is a subgenre of tactical wargames played in real-time, simulating the considerations and circumstances of operational warfare and military tactics. It is differentiated from real-time strategy gameplay by the lack of classic resource micromanagement and base or unit building, as well as the greater importance of individual units and a focus on complex battlefield tactics.