Freedom Force is a computer game developed by Irrational Games and published by Electronic Arts in 2002. The player guides a team of superheroes as they defend Patriot City from a variety of villains, monsters, and other menaces. A sequel, Freedom Force vs. the Third Reich was self-published in early March, 2005.

The game is noted for its humorous but respectful evocation of the Silver Age of Comic Books; in particular, its visual style emulates the art style of the Marvel Universe co-creator, Jack Kirby. Also important is its versatile, expandable game engine, which has allowed a considerable fan-community to spring up. Total conversions featuring Marvel and DC Comics characters have considerably extended the life of an already entertaining game.

The alien mentalist, Mentor, fleeing Lord Dominion and his invading forces, heads towards Earth in a small spaceship containing many canisters of the mysterious "Energy X." Lord Dominion's ships pursue Mentor and destroy his craft just outside the Earth's atmosphere; the blast scatters containers of the substance over the metropolis of Patriot City. Energy X strikes several of the city's inhabitants, giving them superpowers that typically echo their personality traits (for instance, Minuteman and El Diablo) or draw on the situation they were in when energized (e.g., The Ant or Nuclear Winter). Most of the game is set in Patriot City, but a number of other locations and time periods are used, including magical realms, prehistoric times, and realms entirely removed from time and space.