Half-Life: Opposing Force: main story about 4.4 hours; story with some extras about 6.1 hours; 100% completion about 5.4 hours. These are IGDB player-submitted averages from 9 submissions, not a deadline or a prediction of your pace.
| Playthrough | Average time |
|---|---|
| Main story | 4.4 hours |
| Story with some extras | 6.1 hours |
| 100% completion | 5.4 hours |
Source: IGDB player submissions, 9 submissions, last updated January 2026.
About 4 hours to beat the main story of Half-Life: Opposing Force, and about 6 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 4 hours for the main story, 6 hours with some extras and 5 hours for 100%, going by the averages IGDB players have logged.
About 5 hours to complete Half-Life: Opposing Force fully.
Community playtime data is not available for Half-Life: Opposing Force yet. Tracked platforms include Steam.
Game Tales keeps what happened between you and a game in one Tale you can keep building.
Start your Half-Life: Opposing Force Tale.
Today's puzzle: which game is this? · All games, A to Z · Begin your Tale