We weren’t really focused on new features so much as to add a really rich sense of reactivity to the players and the choices they make,” Josh Sawyer, project director on the game, told 1UP. “We put a lot of effort into the ending slides – we know those slides are really popular with people so we want to make sure there’s a huge amount of variety and reactivity with that stuff. Obsidian has said New Vegas’s ending includes too many “major” events, meaning players will have to start a new game and not continue on as before. You can’t free roam in Fallout: New Vegas after the main storyline ends.