Fable II: main story about 12 hours; story with some extras about 25 hours; 100% completion about 40 hours. These are IGDB player-submitted averages from 2 submissions, not a deadline or a prediction of your pace.
Source: IGDB player submissions
Community playtime data is not available for Fable II yet. Tracked platforms include Xbox.
Game Tales keeps what happened between you and a game in one Tale you can keep building.
Today's puzzle: which game is this? · All games, A to Z · Begin your Tale