BoomTown writes: "Unlike the two previous bits of content that could be started at any point during the game, Broken Steel can only be started once the main quest line has been completed. If you have completed the game, you'll be all too aware you couldn't go any further. Well Broken Steel rewrites the ending and opens up access to the Wasteland once more. It also increases the maximum level your character can reach, raising the ceiling from level 20 up to level 30. If you haven't completed the game, this will become active anyway."