This is an issue EVERY GOOD RPG faces. If there is a great story there is an ending and thus begins issues with replayability. However, the issue of replayability, in my opinion, is not about the end game but rather the middle game. The beginning and end of an RPG are but tiny fractions of a well-made game and story. The middle and the options presented are whether an RPG is truly great or not.
There have been people discussion ways to expand the game. One method is to fill in all the missing material that we know is in act three. Another mentioned is to add an act 4. Still another option mentioned is to create a whole new from level zero campaign using the same engine. All of these are good ideas, however I prpose a different idea. Expand Act One and Act two. Do not give more direct storyline missions but rather more side quests. Give the player new options as they move through the middle of the game.
THIS would greatly expand replayability and not cause game imbalances.
