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.
User reviews:
Recent:
Very Positive (76 reviews) - 96% of the 76 user reviews in the last 30 days are positive.
Overall:
Overwhelmingly Positive (2,918 reviews) - 95% of the 2,918 user reviews for this game are positive.
Release Date: Nov 1, 1999

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About This Game

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.

System Requirements

Windows
Mac OS X
SteamOS + Linux

    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

    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
    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
Customer reviews
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Recent:
Very Positive (76 reviews)
Overall:
Overwhelmingly Positive (2,918 reviews)
Recently Posted
ErrorUnknownGT
4.8 hrs
Posted: August 31
Once again, amazing game. The Half Life series has been a blast for me and is probably one of the best single player franchises I ahve laid my hands on. It's cool to see what would've happened from the military's side. Definately worth the pruchase. Offers many hours of gameplay.
Helpful? Yes No Funny
Parkourism
6.6 hrs
Posted: August 30
I don't think geting atacked by aliens was part of the job
Helpful? Yes No Funny
Freezebacon
6.2 hrs
Posted: August 29
Best Half-Life expansion pack. New and interesting weapons. New enemies and A.I allies. And good level layout (Like ALL Half-Life games). Make sure you get this one, it's cheap and 100% worth it.
Helpful? Yes No Funny
Ishvii
1.1 hrs
Posted: August 29
Gearbox (Borderlands creators) did an excellent job of expanding the Half Life universe with this. Now incredibly dated but brilliant 17 years ago.
Helpful? Yes No Funny
Discreet Noob
6.0 hrs
Pre-Release Review
Posted: August 28
If you like Half Life 1, you will love opposing forces.
Helpful? Yes No Funny
Twitchy
2.7 hrs
Posted: August 28
Well, if you have luck as bad as I do, I wouldn't recommend this game. VERY glitchy. Otherwise, it's a pretty good game. Just stay away from the Red Bull. I mean electrified toxic waste.
Helpful? Yes No Funny
Slurpee the Unholy
6.4 hrs
Posted: August 26
My favorite part is killing my squadmates when the damn idiots decide to shoot me instead of the ninjas.
Helpful? Yes No Funny
UrbanElement
6.6 hrs
Posted: August 23
my doggy is ded thx i luv u
Helpful? Yes No Funny
DavidsGames
63.2 hrs
Posted: August 22
I don't know why this has 60 hours
Helpful? Yes No Funny
Gabriel Biceps <HyperX>
15.4 hrs
Posted: August 22
In my opinion its a great game
Helpful? Yes No Funny
Most Helpful Reviews  In the past 30 days
5 of 5 people (100%) found this review helpful
1 person found this review funny
Recommended
56.2 hrs on record
Posted: August 20
Half-Life: Opposing Force is basicly about one of the grunts who were sent to the clean up project and he is imediatly thrown into the horrors of Black Mesa. but its got abit of stuff you are kinda misslead by. for example: he dosen't have to kill everyone. infact, he sorta needs them. its got good story and enviroment. speaking of which, you learn more stuff they were working on. its cool. and its only $4.99! buy it and its sure to meet your entertainment needs. it wont let you down sir or madam!
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3 of 3 people (100%) found this review helpful
2 people found this review funny
Recommended
6.4 hrs on record
Posted: August 26
My favorite part is killing my squadmates when the damn idiots decide to shoot me instead of the ninjas.
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3 of 4 people (75%) found this review helpful
Recommended
8.3 hrs on record
Posted: August 6
To be clear, I absolutely do NOT recommend this game for the singleplayer. It's a shame, because the campaign is something special. Like Blue Shift, it's a fun expanded-universe take on the original Half-Life, this time from the perspective of the Marines. As one of the first to be deployed, your helicopter is shot down, and you wake up around the time of "Forget About Freeman!" as scientists manage to help you. When G-Man conspires against you and makes you MIA, you're forced back into Black Mesa facilities on a somewhat short and very entertaining campaign. Aside from playing as one of the HECU units, you have NVG's, multiple new weapons of all different types, and a variety of new enemies.

This sounds, pretty great, right? Well, it would be... if it worked. Similar to a certain section of HL1, the pathfinding of escort AI are downright broken with the latest updates. The AI will drive you insane with its cosntant indecision and inability to follow you even up a single stair. It's a true test of patience trying to get anything done as the AI immediately decides you're too far the moment you get a centimeter off the ground or more than two feet away from them. After multiple instances of simply doing my best to put up with it, the game finally stopped sending me these broken escorts, only for it to glitch out on an elevator and get my feet stuck inside. My game ended there; this gamebreaking bug was something that I simply couldn't work around. Not even jumping before hitting the bottom could save me from an elevator crash.

This is a real letdown, as if it worked as previously I would unquestionably recommend it. Still, why is it still positive? MULTIPLAYER.

Aside from the once-great campaign is a fully revamped version of Half-Life 1's Deathmatch. Now including more maps, all the new Op4 weapons, and a TDM mode as well as CTF, Half-Life Opposing Force takes the original Deathmatch game mode and turns it up to 12. You'll have to work a bit to get friends or fellow HL1 nerds to join you, but it's absolutely worth the trouble for such a fantastic multiplayer game.

Aside from AI pathfinding bugs and the aforementioned elevator glitch in the campaign, the engine works very well on modern systems and will run on just about anything that supports OpenGL decently. Op4 hasn't particularly aged well from a technical standpoint, but it won't stop you from having a great time if you're patient enough to get around its dead community and singleplayer technical problems.
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1 of 1 people (100%) found this review helpful
Recommended
40.7 hrs on record
Posted: August 1
classic, always go back to this game despite its age.
Was this review helpful? Yes No Funny
1 of 1 people (100%) found this review helpful
1 of 1 people (100%) found this review helpful
1 person found this review funny
Recommended
6.2 hrs on record
Posted: August 29
Best Half-Life expansion pack. New and interesting weapons. New enemies and A.I allies. And good level layout (Like ALL Half-Life games). Make sure you get this one, it's cheap and 100% worth it.
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1 of 2 people (50%) found this review helpful
Recommended
4.2 hrs on record
Posted: August 10
military man with desert eagle has to fight aliens and soldiers.

black ops/10
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1 of 2 people (50%) found this review helpful
Recommended
15.4 hrs on record
Posted: August 22
In my opinion its a great game
Was this review helpful? Yes No Funny
2 of 4 people (50%) found this review helpful
Recommended
27.1 hrs on record
Posted: August 20
This game is 2 ez with puzzles. Its not really that hard but in future i want it really challenging.. One more thing, when im on an a platform after i press the button i keep stuck on it :/
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Most Helpful Reviews  Overall
186 of 211 people (88%) found this review helpful
110 people found this review funny
Recommended
5.6 hrs on record
Posted: October 25, 2014
Military coverup simulator.
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