That's the thing. The back of the game case leads you to believe that you can go back. It reads, and I quote: "New Vegas is more expansive than ever with the Sierra Madre Casino, Zion National Park, Big MT research crater and the treacherous Divide now open for exploring.
Hey guys, need a little help here. I have the Fallout: New Vegas Ultimate Edition and it says that it includes all DLC now open for exploring. So my question is if all DLC is open for exploring, hiw do you go back to the Sierra Madre Casino?