Even though the first Homefront game didn't deliver on all fronts there were a few interesting concepts to work with, like the unification of Korea and the US being the country that was being invaded for once.
Homefront Revolution continues on the same path as its predecessor and gamers gets to save Philadelphia instead on San Francisco this time, the KPA (the Koreans) has apparently managed to conquer all of the United States of America, and lost bits as well. Unlike the first Homefront Dambuster Studios is going for a more open world approach and the new trailer shows how the city changes after each victory against the oppressors.