Half-Life: Opposing Force
Developer: Gearbox SoftwarePublisher: ValveReleased: Nov 1, 1999
$4.99
Reviews
27,729
Overwhelmingly Positive
Positive
95%
26,436 positive
Playing Now
122
concurrent
Peak 24h
122
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 9 days
Total Reviews
27,729
Change
+0.7%
27,72927,629.527,530
Feb 28Mar 13Mar 26
Revenue Estimates
Gross Revenue
$864.8K
Net Revenue
$605.4K
After 30% Steam cut
Estimated Sales
283.2K units
~10x review multiplier
High confidence
Based on 27,729 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
Mar 27, 2026