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: Overwhelmingly Positive (1,233 reviews)
Release Date: Nov 1, 1999

Sign in to add this game to your wishlist or mark as not interested

Buy Opposing Force

HOLIDAY SALE! Offer ends January 2

-50%
$4.99
$2.49

Packages that include this game

Buy Half-Life 1 Anthology

Includes 4 items: Half-Life, Half-Life: Blue Shift, Half-Life: Opposing Force, Team Fortress Classic

HOLIDAY SALE! Offer ends January 2

Buy Half-Life Complete

Includes 10 items: Half-Life, Half-Life 2, Half-Life 2: Deathmatch, Half-Life 2: Episode One, Half-Life 2: Episode Two, Half-Life 2: Lost Coast, Half-Life: Blue Shift, Half-Life: Opposing Force, Half-Life: Source, Team Fortress Classic

HOLIDAY SALE! Offer ends January 2

Buy Valve Complete Pack

Includes 24 items: Counter-Strike: Global Offensive, Portal 2, Left 4 Dead 2, Left 4 Dead, Portal, Team Fortress 2, Team Fortress Classic, Counter-Strike: Source, Counter-Strike, Counter-Strike: Condition Zero, Day of Defeat, Day of Defeat: Source, Half-Life 2, Half-Life 2: Deathmatch, Half-Life 2: Lost Coast, Half-Life 2: Episode One, Half-Life 2: Episode Two, Half-Life, Half-Life: Blue Shift, Half-Life: Opposing Force, Half-Life Deathmatch: Source, Half-Life: Source, Ricochet, Deathmatch Classic

HOLIDAY SALE! Offer ends January 2

 

Recommended By Curators

"Still one of my favorite expansions ever. Kill aliens (or scientists) with a wrench, a tentacle or a labia that shoots green eggs and ham. Recommended."

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
Helpful customer reviews
51 of 56 people (91%) found this review helpful
5.6 hrs on record
Posted: October 25
Military coverup simulator.
Was this review helpful? Yes No
42 of 46 people (91%) found this review helpful
5.0 hrs on record
Posted: October 25
Adrian Shepard: ...
Gordon Freeman: ...
You don't need a character to talk to make a good game. Tenouttaten.
Was this review helpful? Yes No
40 of 46 people (87%) found this review helpful
11.5 hrs on record
Posted: November 9
SNIPER SCHOOL SURE PAID OFF TODAY
Was this review helpful? Yes No
28 of 29 people (97%) found this review helpful
15.1 hrs on record
Posted: September 27
Making an expansion pack to Half Life was no small task. But Gearbox was more than willing to set the bar.

Opposing Force is fundamentally a similar experience to Half Life 1. But it expanded on it's core foundation in numerous ways. There are new actually interesting weapons, friendly squad members who serve different non-combat roles and a few other things.

But what Opposing Force does well is it continues the legacy left by Half Life 1. It has consistantly good pacing and like Half Life dynamically goes from low-key puzzle segments to high octane action horror. It's just so much fun to play it's an actual challenge for me to pick between playing either Half Life or Opposing Force. Since both games compliment each other so well.

If you like Valve games, or even first person shooters. You owe it to yourself to play Opposing Force. It is one of those games that you just can't stop playing.
Was this review helpful? Yes No
16 of 16 people (100%) found this review helpful
4.4 hrs on record
Posted: October 8
You get to play as a mute special force unit who wrecks havoc upon Black Ops assassins, and aliens from an alternative dimension with a wrench.
Was this review helpful? Yes No
12 of 12 people (100%) found this review helpful
19.3 hrs on record
Posted: October 3
Best expansion for a game : EVER!
I haven't had so much enjoyment playing an expansion pack. As always, Valve never fails to impress, same goes to Gearbox for their legendary game developing skills.
Opposing Force not only expands the main game, but adds major updates to the already grand foundation laid out by Half-Life. The story starts right where Half-Life starts, but you're controlling a commando of the HECU unit (which was the army squadrons that were trying to kill you in the original game) and the plot cuts off to a different direction that we never got to see before and also you get to have super cool buddies and with so many additions to the game which are : MANY new weapons, different equipment, lots of new characters, better AI, squad teammates with different attributes, lots of new enemies.
And best thing was, I got this gem during the Valve special sale event along with the whole Half-Life collection just for 10 bucks. Best decision EVA!
10/10 - All hail Gaben, our lord.
Was this review helpful? Yes No
12 of 13 people (92%) found this review helpful
4.9 hrs on record
Posted: November 7
Fantastic expansion for the half-life universe.

New weapons, more pleasant encounters with scientist than in the first half-life.

More complex HECU units with more variety in the apperal aspect of the soldiers.

Different skillsets for soldiers in your platoon I.E.; Engineer Torching down sealed doors, medics for healing, etc.

I recommend you save frequently because them auto-saves are IMO not frequent enough.

Sadly the military still wants to kill you even though your on they're team

( Exluding the HECU soldiers known for their grey camo and Green PCV vest, enemy military units will be in all black. )
Was this review helpful? Yes No
14 of 17 people (82%) found this review helpful
210.0 hrs on record
Posted: November 9
Operation: Mother's House
Was this review helpful? Yes No
10 of 10 people (100%) found this review helpful
8.0 hrs on record
Posted: October 15
As someone loving a good setting and a great story with room for theories and mystery, this game gives me everything I could ask for.
If you love or even like Half Life, play this game!
It enhances the story for a big chunk.
This game is from 1999, so I won't even talk about graphics and stuff, you can imagine how it looks.

The only thing that bothers me is that you change weapon if you pick up the new one.
That killed me once as I got some Nades from a crate, but that is a little thing.
You can't change that in the options menu, if you know console commands feel free to change it, I don't know how.

Anyways, you should totally get this game.
I hate that I did not play it earlier.
Was this review helpful? Yes No
9 of 9 people (100%) found this review helpful
4.9 hrs on record
Posted: October 20
Well, no need to tell you what it is.
Opposing Force gives you different part of view on the Black Mesa accident, playing as Adrian Shepard, Miliary Specialist that has been sent to eliminate Gordon Freeman, but after arriving discovers that the best thing to do, is escape the facility.
Was this review helpful? Yes No
10 of 11 people (91%) found this review helpful
7.2 hrs on record
Posted: November 2
A nice long expansion at around 7 hours on my first playthrough on medium difficulty it's well worth $4.99. Especially if you want more Half Life while waiting for Episode 3/Half Life 3.
Was this review helpful? Yes No
7 of 7 people (100%) found this review helpful
18.5 hrs on record
Posted: October 27
Honestly....Better than the original hl. 9/10
Was this review helpful? Yes No
9 of 11 people (82%) found this review helpful
0.1 hrs on record
Posted: September 30
An excellent expansion pack from developer Gearbox! I wonder how many of us still know what expansions were... nowadays these extra stories would come in the form of DLCs not an expansion pack. It meant to indicate a longer story and this is definitely a bigger pack than a dlc which can be a single weapon or a new costume for a character in the game.

In any case, Opposing Force puts us in the shoes of a corporal, a certain Adrian Shepard, who - along with his fellow soldiers - is sent to neutralise the enemies invading the Black Mesa facility. As expected, things go awry and you are alone facing the good-old aliens. There is a new assortment of weapons, new enemies and new music. Oh, and there are fat security officers helping you!

By the way: the game comes with widescreen settings and vsync can be switched on! Just excellent!

A relatively long and challenging expansion pack that comes very cheap. It did age a lot throughout the 15 years but it is still a great game... at least for reminiscing purposes.
Was this review helpful? Yes No
11 of 16 people (69%) found this review helpful
0.9 hrs on record
Posted: November 3
make this game with hl2 engine
Was this review helpful? Yes No
5 of 5 people (100%) found this review helpful
14.7 hrs on record
Posted: December 8
best half life game in the series :)
Was this review helpful? Yes No
18 of 30 people (60%) found this review helpful
1.3 hrs on record
Posted: August 20
Call of Duty: Black Mesa
Was this review helpful? Yes No
4 of 4 people (100%) found this review helpful
2.7 hrs on record
Posted: October 14
Half Life: Opposing force is an extension to the original Half Life game.
You play as a soldier interventing during the Black Mesa incident, so it happens (at least starts) during HL1's event.
It's a good extension and is worth giving a try if you liked HL1, as it brings a few new elements (weapons, some new gameplay possibilities like interaction with props) and it's always good to meet again these stupid Rambo sounding soldiers.
Was this review helpful? Yes No
4 of 4 people (100%) found this review helpful
2.9 hrs on record
Posted: September 29
A perfect add on for the original game, adds a whole new level of understanding and perspective to the events of Half Life. Worth buying, can't fault the game at all, as it still manages to entertain me as much as it did when I played it for the first time a few years ago, and has continued to do so for other people for years, great games never become "outdated" and this game is a truly shining specimen of a classic fps that delivers both action and reflection upon the original game. I urge you to buy it, no Half Life player should think twice before doing so

10/10
Was this review helpful? Yes No
5 of 6 people (83%) found this review helpful
1.4 hrs on record
Posted: September 28
HL: OpF was a great add on part to the Half-Life 1 story, where you play as Adrien Shepard...hope I spelt that correctly...I really don't like describing things, but I recommend because it was AWESOME FUN!
Was this review helpful? Yes No
3 of 3 people (100%) found this review helpful
1.5 hrs on record
Posted: October 4
In my opinion, this is easily the best Half Life classic. It features more weapons, more enemies, and overall a better gaming experience. I would higly recommend this game for anyone who liked the original Half Life.
Was this review helpful? Yes No