Fallout New Vegas is, I have to say my absolute Favourit concerns what RPG / Shooter combinations. There are continuing a stunning variety of weapons, enemies, moral choices and so on and so. I need in games not necessarily the uncut version, but it is then but a fun bonus. Regarding Steam I had until now no problems even with regard to the installation time of the game. There are 75 possible achievements in Steam which all give extra experience points, but not all can be achieved with a time playthrough. Oh and as for the season:'m at 55 hours did not even begin to even started the main game through and not have one of the DLC's. The only dampener are regular crashes, ie ca every 2nd hour of play, and I as I said, I'm already at 55 hours of play, then comes quite a bit together. However, do not affect the gameplay at all in my opinion.
Whether you know the predecessor or just shooter and / or RPG fan, this game is in my opinion simply mandatory.