Half-Life: Opposing Force
History
Oct 1 – Oct 14
Total Steam reviews. The slope is the signal: a steady climb long after launch means the game is still selling.
How it compares
FPS →Against the 120 most-reviewed FPS games on Steam
Outearns 23% of them — in the bottom quarter of the group.
The group is the games with the most reviews under this tag, not every release, so it leans toward games that sold — a percentile here is a harder test than the same percentile across the whole store would be.
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.
- Developer
- Gearbox Software
- Publisher
- Valve
- Genre
- FPS
- Released
- Nov 1, 1999
- Steam app ID
- 50
- Data updated
- Oct 14, 2026