Is it worth buying?
I have the game and let me just say, if you liked the multiplayer, then you will fall in love with the campaign. It has some of he best voice acting I've scene in a video game (I think the voice acting in this is even better than Batman: Arkham City), the graphics are extremely superior to any game if you have an HDMI, and (depending on the TV) even if you don't they still look amazing. There are tons of huge set-piece moments in the campaign that make you want to keep playing and you are disappointed when it ends. Bottom line, if you have a PS3, you NEED THIS GAME!