Recommended· 9 Jul 2026
While i believe a civil servant, like yourself understands the importance of discretion my employers are not quite so trusting.
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Standard / GLOBAL
About this game
95%
Overwhelmingly Positive15 369 Steam reviews
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.
Player reviews
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Recommended· 28 Jul 2026
want more half life? this is the game for you a few weapons are completely useless imo but i did end up using them all in my playthrough
Recommended· 6 Jul 2026
My, it's been 5 years since I last played this game, and I still remember it like it was yesterday, going into black mesa, guns blazing. My only complaint is that I wish I'd played it more since 2021.
Recommended· 26 Jul 2026
This game is good but I ♥♥♥♥♥♥♥ hate it. The hard mode was miserable asf. It's fun but balance is atrocious. Play on normal and it's a good game np.
Recommended· 27 Jul 2026
THIS GAME IS very good i think you should play the games in order and also we are buying the orange box so yeah more half life yippee so yeah you should 100% play half life opposing force its very good
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Half-Life: Opposing Force - PC (Steam)
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Half-Life: Opposing Force - PC (Steam)
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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.
- Platform
- Steam (PC)
- Developer
- Gearbox Software
- Publisher
- Valve
- Release date
- 1 Nov, 1999
- Languages
- Genres
- Action
- Product type
- Digital key / activates on Steam
Supported languages
| Interface | Audio | Subtitles | |
|---|---|---|---|
| ✓ | — | ✓ | |
| ✓ | — | ✓ | |
| ✓ | — | ✓ | |
| ✓ | — | ✓ |
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.
News
6 years ago
Half-Life: Opposing Force update released
An update for Half-Life: Opposing Force is now available:<br><br><div class="bb_h1">Fixes</div><ul class="bb_ul"><li> Fixed end of game transition failing to run after defeating final boss<br></li><l
7 years ago
Half-Life: Opposing Force update released
A small update for Half-Life: Opposing Force is now available:<br><br>Engine<br><ul class="bb_ul"><li> Fixed bug in skybox image loading <br></li><li> Fixed bug in demo command processing<br></li><
9 years ago
Half-Life: Opposing Force update released
We have updated the public release of Half-Life: Opposing Force.<br><br>Changes in this update are: <br><ul class="bb_ul"><li>Fixed crash when entering certain malformed strings into the game console. Thanks to Marshal Webb from B
Best Reviews
👍 Recommended · Steam player · 9 Jul 2026
While i believe a civil servant, like yourself understands the importance of discretion my employers are not quite so trusting.
3 found this helpful
👍 Recommended · Steam player · 6 Jul 2026
My, it's been 5 years since I last played this game, and I still remember it like it was yesterday, going into black mesa, guns blazing. My only complaint is that I wish I'd played it more since 2021.
2 found this helpful
👍 Recommended · Steam player · 26 Jul 2026
This game is good but I ♥♥♥♥♥♥♥ hate it. The hard mode was miserable asf. It's fun but balance is atrocious. Play on normal and it's a good game np.
1 found this helpful
Recent Reviews
👍 Recommended · Steam player · 28 Jul 2026
want more half life? this is the game for you a few weapons are completely useless imo but i did end up using them all in my playthrough
0 found this helpful
👍 Recommended · Steam player · 27 Jul 2026
THIS GAME IS very good i think you should play the games in order and also we are buying the orange box so yeah more half life yippee so yeah you should 100% play half life opposing force its very good
0 found this helpful
👍 Recommended · Steam player · 26 Jul 2026
This game is good but I ♥♥♥♥♥♥♥ hate it. The hard mode was miserable asf. It's fun but balance is atrocious. Play on normal and it's a good game np.
1 found this helpful