ActionFPSClassicSci-fiSingleplayerShooter
Half-Life: Opposing Force Steam store
Game description
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.
Basic info
| Developer | Gearbox Software |
|---|---|
| Publisher | Valve |
| Platforms | Windows · macOS · Linux |
| Steam Deck | Playable! |
| Release date | Nov 1, 1999 |
| Price |
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Review Analysis Score
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Steam review activity
since launch, by month · major update
Nov 2010Nov 2026
per day · 230 reviews, peak 13/day
Oct 5Nov 2
per month · 677 reviews, peak 260/month
Aug 2026Oct 2026
per month · 1,522 reviews, peak 357/month
May 2026Oct 2026
per month · 3,300 reviews, peak 402/month
Nov 2025Oct 2026
Steam only gives daily counts for the last 30 days; longer ranges are by month. Months with fewer than 10 reviews are left out of % positive.