Alien: Isolation: main story about 18.3 hours; story with some extras about 22.5 hours; 100% completion about 34.1 hours. Times from HowLongToBeat, averaged from 5,596 players' logged playthroughs, not a deadline or a prediction of your pace.
| Playthrough | Average time |
|---|---|
| Main story | 18.3 hours |
| Story with some extras | 22.5 hours |
| 100% completion | 34.1 hours |
Times from HowLongToBeat, averaged from 5,596 players' playthroughs, checked October 2026.
About 18 hours to beat the main story of Alien: Isolation, and about 23 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 18 hours for the main story, 23 hours with some extras and 34 hours for 100%, going by HowLongToBeat's times.
About 34 hours to complete Alien: Isolation fully, about 1.9 times the main story.
The share of Steam players who have each achievement, from the most common to the rarest.
Shares from Steam. Secret ones are left out.
Community playtime data is not available for Alien: Isolation yet. Tracked platforms include PlayStation.
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