Super Mario Galaxy 2: main story about 15 hours; story with some extras about 21.7 hours; 100% completion about 28.7 hours. These are IGDB player-submitted averages from 4 submissions, not a deadline or a prediction of your pace.
| Playthrough | Average time |
|---|---|
| Main story | 15 hours |
| Story with some extras | 21.7 hours |
| 100% completion | 28.7 hours |
Source: IGDB player submissions, 4 submissions, last updated May 2026.
About 15 hours to beat the main story of Super Mario Galaxy 2, and about 22 hours with some of the side content. The story figure is the average for players who went to the credits without much of the side content, so a playthrough that wanders runs longer.
About 15 hours for the main story, 22 hours with some extras and 29 hours for 100%, going by the averages IGDB players have logged.
About 29 hours to complete Super Mario Galaxy 2 fully, about 1.9 times the main story.
Community playtime data is not available for Super Mario Galaxy 2 yet. Tracked platforms include Other.
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