Fallout New Vegas Ultimate Edition is a game that was released for the Xbox One in November of 2015. It is a prequel to Fallout 4 and is set in the same world as that game. It was created by Obsidian Entertainment and published by Bethesda Softworks. There have been reports that Fallout New Vegas Ultimate Edition does not work on Xbox One. This has been verified by several people who have played it. Some have said that they cannot save their game, others have said that they cannot load it. There are several possible reasons why this might be the case. One possibility is that the game has not been updated to support Xbox One since its release. Another possibility is that the game has not been properly tested on Xbox One and may not work correctly. Finally, it could be that there are some issues with the game itself which are not being addressed by the developers or publisher.