BioShock Infinite: main story about 12.8 hours; story with some extras about 16.8 hours; 100% completion about 28.6 hours. These are IGDB player-submitted averages from 29 submissions, not a deadline or a prediction of your pace.
Source: IGDB player submissions
Community playtime data is not available for BioShock Infinite yet. Tracked platforms include Xbox.
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