No, my opinion on Co-op for the fallout games would be amazing, although a big part of fallout would have to be taken out: V.A.T.S.
It is not an expansion pack for Fallout 3! Fallout: New Vegas and Fallout 3 are separate titles. As for how to acquire it, you can purchase it almost anywhere retail video-games are sold.
Occasionally Fallout: New Vegas will freeze, but not as frequently as Fallout 3.
fallout: new vegas 2 I've heard.
Fallout: New Vegas
Fallout New Vegas is the fifth installment in the Fallout series. It is for the Xbox 360, PS3, and the PC.
In my opinion Fallout New Vegas is. In Fallout NV it is easier to make caps so you can buy better wepons and ammo. In Fallout 3 It's hard to make a lot of caps in the begining making it a slow start. But is you want to test your skills play Fallout 3.
Fallout new Vegas
No, you can't get married in Fallout: New vegas, but you can have sex in the game :)
Yes they are, although they play much smaller part than they did in Fallout 3
fallout new Vegas will be on PlayStation 3 and Xbox 360
In my opinion, Fallout 2.
Fallout New Vegas is all one game.