Half-Life: Source
Winner of over 50 Game of the Year awards, Half-Life set new standards for action games when it was released in 1998. Half-Life: Source is a digitally remastered version of the critically acclaimed and best selling PC game, enhanced via Source technology to include physics simulation, enhanced effects, and more.
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Half-Life: Opposing Force on Steam
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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.
Half-Life: Opposing Force is a fps, action and classic game
developed by Gearbox Software
and published by Valve.
Released on November 01st 1999 is available on Windows, MacOS, Linux, Steam Deck and Steam Machine.
It has received 25,561 reviews of which 24,363 were positive and 1,198 were negative resulting in an impressive rating of 9.3 out of 10. 😍
The game is currently priced at 4.89€ on Steam.
The Steam community has classified Half-Life: Opposing Force into these genres:
Media & Screenshots
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System requirements
These are the minimum specifications needed to play the game. For the best experience, we recommend that you verify them.
Windows
Minimum: 500 mhz processor, 96mb ram, 16mb video card, Windows XP, Mouse, Keyboard, Internet Connection
Recommended: 800 mhz processor, 128mb ram, 32mb+ video card, Windows XP, Mouse, Keyboard, Internet Connection
MacOS
Minimum: OS X Snow Leopard 10.6.3, 1GB RAM, 4GB Hard Drive Space,NVIDIA GeForce 8 or higher, ATI X1600 or higher, or Intel HD 3000 or higher Mouse, Keyboard, Internet Connection
Linux
Minimum: Linux Ubuntu 12.04, Dual-core from Intel or AMD at 2.8 GHz, 1GB Memory, nVidia GeForce 8600/9600GT, ATI/AMD Radeaon HD2600/3600 (Graphic Drivers: nVidia 310, AMD 12.11), OpenGL 2.1, 4GB Hard Drive Space, OpenAL Compatible Sound Card
Steam Price & Best Deals
User reviews & Ratings
Explore reviews from Steam users sharing their experiences and what they love about the game.
Opposing Force takes the best bits of the original Half-Life and mixes them into a small package. Think of it as just more Half-Life. You play through the Black Mesa incident from a new perspective, encounter a couple of new enemies, and enjoy new weapons and firepower. This expansion is simply fun to play and highly recommended...something I cannot say about Half-Life: Blue Shift.
If you want more Half-Life this is definitely that. Seeing the Black Mesa incident from a completely different perspective is very interesting. In terms of gameplay, there is a bigger focus on fast paced action than the original, which lends itself well to the new enemy types and weapons. Unfortunately, in true 90s shooter fashion the final boss is a major let down, however the regular combat encounters with the new enemies and weapons are well thought out and keep the game from getting stale.
this expansion was REALLY fun, i see why people prefer it to blue shift. it makes the world of half life feel more real to me. the perspective of the "bad guys" is always fun to see, humanizing these random military grunts in this world. also, similar to blue shift, the gordon cameo was pretty sick. i just wish shephard got a better ending, it's so sad what happens to him. i genuinely hope valve uses shephard in some other half life installment, or at least for fans to create some story for him as well.
Half-Life: Opposing Force introduces players to Corporal Adrian Shephard, a member of the HECU unit sent to eliminate everyone involved in the failed experiment at the Black Mesa facility. The troops are quickly overwhelmed by the scale of the disaster, and the story begins at a frantic pace, placing Shephard in a constant state of collapse and survival. The events unfold simultaneously with those of Half-Life, where Gordon Freeman is responsible for opening the portal to Xen and unleashing the alien creatures. This time, the player experiences the catastrophe from a different point of view, and throughout his struggle to stay alive, Shephard also encounters the enigmatic G-Man. As in the original game, the narrative avoids heavy cinematic interruptions, keeping the tension high at all times. Opposing Force introduces new enemies and weapons that expand the player’s tactical options. The campaign is noticeably shorter than that of the main title, focusing instead on showing the crisis from an alternate perspective. This shift in viewpoint is what makes the expansion particularly compelling. It allows players to revisit familiar locations while revealing the desperate situation of a military unit that, in the original game, stood firmly against Gordon Freeman. Officially Finished.
Half-Life: Opposing Force might be one of the best expansions to any game ever made. New weapons, an entirely new alien race and new plot points that significantly expand the Half-Life story. You follow Adrian Shepherd who's apart of the HECU. You get to see most of the lambda complex after Gordon Freeman went to Xen. G-Man isn't missing from this game, and he's got his own fair few tricks up his sleeve prepared for Shepherd. I believe this game to be canon, and for all this expansion offers, it's an absolute must for ANYONE that wants to either delve deeper into half-life's universe, or just play more half-life.
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Frequently Asked Questions
Half-Life: Opposing Force is currently priced at 4.89€ on Steam.
No, Half-Life: Opposing Force is currently not on sale. You can purchase it for 4.89€ on Steam.
Yes, Half-Life: Opposing Force received 24,363 positive votes out of a total of 25,561 achieving an impressive rating of 9.32.
😍
Half-Life: Opposing Force was developed by Gearbox Software and published by Valve.
Yes, Half-Life: Opposing Force is playable and fully supported on Windows.
Yes, Half-Life: Opposing Force is playable and fully supported on MacOS.
Yes, Half-Life: Opposing Force is playable and fully supported on Linux.
Yes, Half-Life: Opposing Force is playable on Steam Deck, though it might require a few minor tweaks. Make sure to check the Steam store page and community feedback on ProtonDB for exact compatibility details.
Yes, Half-Life: Opposing Force is playable on Steam Machine, though it might require a few minor tweaks. Make sure to check the Steam store page and community feedback on ProtonDB for exact compatibility details.
No, Half-Life: Opposing Force does not support VR.
Half-Life: Opposing Force offers both single-player and multi-player modes.
Half-Life: Opposing Force offers both Co-op and PvP modes.
No, Half-Life: Opposing Force does not currently offer any DLC.
No, Half-Life: Opposing Force does not support mods via Steam Workshop.
No, Half-Life: Opposing Force does not support Steam Remote Play.
Yes, Half-Life: Opposing Force is enabled for Steam Family Sharing. This means you can share the game with authorized users from your Steam Library, allowing them to play it on their own accounts. For more details on how the feature works, you can read the original Steam Family Sharing announcement or visit the Steam Family Sharing user guide and FAQ page.
You can find solutions or submit a support ticket by visiting the Steam Support page for Half-Life: Opposing Force.
Data sources
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Additionally, we incorporate data from the SteamSpy API, which offers insights into game sales and player statistics. This helps us present a comprehensive view of each game's popularity and performance within the gaming community.
Last Updates| Steam data | 18 September 2026 12:11 UTC |
|---|---|
| SteamSpy data | 14 October 2026 16:10 UTC |
| Steam price | 28 October 2026 04:04 UTC |
| Steam reviews | 22 October 2026 05:47 UTC |
If you'd like to dive deeper into the details about Half-Life: Opposing Force, we invite you to check out a few dedicated websites that offer extensive information and insights. These platforms provide valuable data, analysis, and user-generated reports to enhance your understanding of the game and its performance.
- SteamDB - A comprehensive database of everything on Steam about Half-Life: Opposing Force
- SteamCharts - Analysis of Half-Life: Opposing Force concurrent players on Steam
- ProtonDB - Crowdsourced reports on Linux and Steam Deck Half-Life: Opposing Force compatibility
Game modes
Features
Online players
83
Developer
Gearbox Software
Publisher
Valve
Release
01 Nov 1999
Platforms