Half-Life: Opposing Force
Developer: Gearbox SoftwarePublisher: ValveReleased: Nov 1, 1999
$4.99
Reviews
28,891
Overwhelmingly Positive
Positive
95%
27,544 positive
Playing Now
52
concurrent
Peak 24h
52
players
About
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.
Historical Trends
Last 11 days
Total Reviews
28,891
Change
+0.5%
28,89128,814.528,738
Aug 1Aug 14Aug 28
Revenue Estimates
Gross Revenue
$924.1K
Net Revenue
$646.9K
After 30% Steam cut
Estimated Sales
302.6K units
~10x review multiplier
High confidence
Based on 28,891 reviews. Large sample size provides reliable estimates.
ℹ️ No verified data
Estimates are calculated using our algorithm based on reviews, price, and game age.
These are estimates only. Actual sales and revenue may differ significantly.
Last Updated
Aug 28, 2026