Command & Conquer: Red Alert 3

What if Hitler never existed? Einstein pondered the question and created a time-machine to eliminate Hitler as a young man, thus preventing World War II as history remembers it. However, Einstein stopped one evil only to create another - because Stalin's Soviet Union is now poised to conquer Europe... and Allies must stop them!

The gameplay features are similar to those of previous games in the series, including building a base with some defenses, massing units, harvesting resources, etc. The game has a variety of environments in its missions, adding some indoor missions that use only infantry units.