Somewhat, you can go off and do whatever side missions you want, or spend the entire time solving riddles, but there is a overarching story you have to follow to gain new gadgets, areas to explore, and meet new characters. But trust me, this game is anything but a linear point a to point b game, and you will never want to stop playing.
It is absolutely worth it because the catwoman chapters mix the game up a bit and you can use her and all the other characters in the challenge maps, and there is tons of dlc on the way, including nightwing, robin, and a ton of skins for batman. Even without the dlc the game is friggin amazing, but it makes the game even better.
The game uses melle weapons most of the time, which you have to repair to keep in fair condition. Guns are in the game, but they are not around every corner and you have to look for them. Ammo is suppose to be hard to come buy, like I said it is favored more towards melle.
I havent played the game this is just what I have read previously so dont quote me on any of this.
I think an infamous 3 would be awesome, but how thats possible, I dont know, leave that to the creators. A Gears of War prequel sounds cool around the time the locusts just started showing up. If Falliout could be out of the US that would be awesome but that dosent seem possible, but if it is a London or Paris type setting would be cool. Most of all I would like to take a trip to Vice City please.
InFamous is an amazing game and it isnt at all repetitive with all the new powers you unock in the game. And you are guarenteed two playthroughs with the karma system (one good one evil). It is a refreshing game and trust me, with the second game coming out, you dont wanna miss this party.
I doubt you will have to pay for it, I am pretty sure Activision already cleared something like this up in the past. But EA is becoming even more egotistical by making people pay extra for online, God forbid I buy a used game to save money.
It was hacked and all of everyones personal info (possibly credit card #) has been stolen. It is now shut down and I am really starting to hate Sony right now even though it isnt fully their fault, but hopefully this will give them something to think about in the future.