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- $4.99BuySteamCheapest
Price analysis
The most common cut was -75%. Across 10 discount periods in 24 months (about every 76 days), the median sale length was 7 days. The lowest price in this period was $0.74 (-85%) on Nov 15, 2024; today's price is 574% higher. The last sale was 21 days ago (Oct 7, 2026).
Return to the Black Mesa Research Facility as one of the military specialists assigned to eliminate Gordon Freeman. Experience an entirely new episode of single player action. Meet fierce alien opponents, and experiment with new weaponry. Named 'Game of the Year' by the Academy of Interactive Arts and Sciences.
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From Wikipedia
Half-Life: Opposing Force is an expansion pack for the first-person shooter game Half-Life (1998). It was developed by Gearbox Software and published by Sierra On-Line for Windows on November 19, 1999. Opposing Force was the first expansion for Half-Life and was announced in April 1999. Lead designer Randy Pitchford believed Gearbox was selected to develop Opposing Force because Valve, the creators of Half-Life, wanted to concentrate on their future projects. Over the course of development, Gearbox brought in a variety of talent from other areas of the video games industry to help bolster various aspects of design.
Read more on Wikipedia →Recent discounts
| Period | Days | Max off | Low | MSRP |
|---|---|---|---|---|
| 2026. 10/1 ~ 10/7 | 7d | -80% | $0.99 | $4.99 |
| 2026. 6/25 ~ 7/8 | 14d | -80% | $0.99 | $4.99 |
| 2026. 3/19 ~ 3/25 | 7d | -75% | $1.24 | $4.99 |
| 2025. 12/18 ~ 1/4 | 18d | -75% | $1.24 | $4.99 |
| 2025. 9/29 ~ 10/5 | 7d | -75% | $1.24 | $4.99 |
| 2025. 6/26 ~ 7/9 | 14d | -75% | $1.24 | $4.99 |
| 2025. 3/13 ~ 3/19 | 7d | -75% | $1.24 | $4.99 |
| 2024. 12/19 ~ 1/1 | 14d | -75% | $1.24 | $4.99 |
+2 more periods (see heatmap)
Latest news
- Nov 19, 2019A new Half-Life would have to be VR
- Oct 8, 2019Half-Life: Opposing Force update released
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