In the singleplayer, you play as an American resistance fighter, trying to defend USA from the United Korea, using guerrilla tactics, commandeering military vehicles and utilizing advanced drone technology.
In the multiplayer, you play on dedicated servers that support 32 players. You can play either on the USA or United Korea. Each new copy of Homefront includes an online pass, enabling users the full multiplayer experience. It isn't required to play the multiplayer game but without it, the level cap would be 5 (75 with online pass).
Metacritic has awarded the game with a score of 88/100, which is just above Call of Duty: Black Ops.
Also Gamerankings awarded the game with an overall 89.33%, which tops both Battlefield: Bad Company 2 and Call of Duty: Black Ops.
Basicly, if you are fed up with the current shooters, you should try this game out. It brings some new stuff to the table and has received some good ratings.