Half-Life: Opposing Force
Developer: Gearbox SoftwarePublisher: ValveReleased: Nov 1, 1999
$4.99
Reviews
28,089
Overwhelmingly Positive
Positive
95%
26,776 positive
Playing Now
98
concurrent
Peak 24h
98
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
28,089
Change
+0.6%
28,08928,00027,911
Apr 15Apr 28May 12
Revenue Estimates
Gross Revenue
$934.7K
Net Revenue
$654.3K
After 30% Steam cut
Estimated Sales
306.1K units
~11x review multiplier
High confidence
Based on 28,089 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
May 12, 2026