Half-Life: Opposing Force is an expansion pack for Valve Software's science fiction first-person shooter video game Half-Life. The game was developed by Gearbox Software and published by Sierra Entertainment on November 1, 1999. Opposing Force is the first expansion for Half-Life and was first announced in April 1999. Randy Pitchford, the lead designer on the game, later noted that he believed Gearbox was selected to develop Opposing Force because Valve wanted to concentrate on their future projects. Over the course of development, Gearbox brought in a variety of outside talent from other areas of the video games industry to help bolster various aspects of design. Opposing Force returns to the same setting as Half-Life, but instead portrays the events from the perspective of a U.S. Marine, one of the enemy characters in the original game. The player character, Adrian Shephard.

  • View media
  • View media
  • View media
  • View media
  • View media
  • View media
Post article RSS feed Related Articles

Since we are in the new year I decided to post an article informing everyone about the development of OP Assault.


2015 Has been a great year for the mod. I managed speed up the development a lot last year and which resulted in the release of the long awaited demo. After the demo was released I was working only on the maps shown in the demo to further improve gameplay and fixed a lot of bugs to provide smooth experience and I'm quite happy with the results :)

After my last release v1.4 of the game I've finally managed to continue working where I left off. I also decided to change the development of the mod. From now on with every "Mission" I completely map I will be releasing a version update so players can play the new content without waiting forever and also provide feedback if needed.

And this is where my last announcement comes. I released a video trailer for the upcoming version of the game which includes two new missions. Estimate release date is unknown as of this moment but it shouldn't be long.

Now for those that didn't know about v1.4 till now I recommend you download it. It contains a massive list of improvements /fixes.

DOWNLOAD V1.4

Opposing Force Assault v1 Alpha Demo


RTSL: 2015 Awards

RTSL: 2015 Awards

News 7 comments

Check out the winners of the Run Think Shoot Live, Awards 2015.

Life Signs 2015

Life Signs 2015

News 30 comments

Operation Black Mesa and Guard Duty are back! It's been a very busy year and here's what we've been up to.

Alpha Demo available

Alpha Demo available

Opposing Force Assault 7 comments

Well here it is. The long awaited alpha demo I've been talking about.

Military Duty - Mod Release

Military Duty - Mod Release

Military Duty 13 comments

Hello people. Today I'm proud to announce you the release of a new Hl1 Opposing Force mod.

Sandbot v0.2

Sandbot v0.2

Full Version 2 comments

Beta release of Sandbot - a bot for Half-Life, Half-Life Opposing Force (deathmatch), Gunman Chronicles, Natural Selection (combat) and They Hunger. Extract...

Hi-Def Gman HL1 "Wisely done Mister Freeman"

Hi-Def Gman HL1 "Wisely done Mister Freeman"

Audio 3 comments

A bit of clever editing with some Michael Shapiro lines to re-create the final words spoken in the canon ending of Half-Life, spoken by the gman: "Wisely...

Half-Life Updates Pre & Post 1.1.0.0

Half-Life Updates Pre & Post 1.1.0.0

Patch 3 comments

This is a collection of what will be needed to get Half-life (1998 Release) up to date. Also includes the 3Dfx MiniGL driver update if you have a voodoo...

[OBSOLESCENT] Unknown Opposing Force [v1.0]

[OBSOLESCENT] Unknown Opposing Force [v1.0]

Preliminary Opposing Force Full Version 0 comments

The old abandoned version. I'm not sure 100% that it will work correctly.

HL Sierra SD MODEL PACK

HL Sierra SD MODEL PACK

Full Version 0 comments

This SD Pack is for the old school sierra half-life Version, to replace that old ugly low definition pack, I did not make this I only repacked it into...

HL : New SD Model Pack

HL : New SD Model Pack

Full Version 8 comments

Half-life New Super definition pack, done this long time, re-uploaded to be download, this all model and redone, and repacked, special thanks to Diamondd...

Comments  (0 - 10 of 73)
GamerBoy2
GamerBoy2

Very good.

Reply Good karma Bad karma+1 vote
Guest
Guest

great mod

Reply Good karma Bad karma+1 vote
零

No, it's an expansion.

Reply Good karma Bad karma+2 votes
RolandDeschain79
RolandDeschain79

You can play Opposing Forces on your Android phone or tablet with Xash3D!

Half Life: Opposing Forces on Android Fixed with Xash3D (Note 2)
Youtu.be

Reply Good karma Bad karma+1 vote
Guest
Guest

This comment is currently awaiting admin approval, join now to view.

staffssuckshit
staffssuckshit

This game rocks... it brings me many of my childhood.

Reply Good karma Bad karma+2 votes
Harley♥
Harley♥

Gearbox should release the Source Code.

Reply Good karma Bad karma+4 votes
GraphicGuy2025
GraphicGuy2025

It`s a good game but have be forgotten by Gearbox. It`s an important part of my childhood. Gearbox rewrote the AI of npc and add many new weapons in it. Many modders want to use them in their mods.

Gearbox don't know what is opensource just like valve don`t know what is three

Reply Good karma Bad karma+3 votes
hafidin
hafidin

how to download opposing force without mod ? please... :(

Reply Good karma Bad karma+2 votes
hafidin
hafidin

how to download ?

Reply Good karma Bad karma+3 votes
Post a comment
Sign in or join with:

Only registered members can share their thoughts. So come on! Join the community today (totally free - or sign in with your social account on the right) and join in the conversation.

Icon
Half-Life: Opposing Force
Platforms
Windows
Developer
Gearbox Software
Engine
GoldSource
Contact
Send Message
Release date
Game watch
Start tracking
Share
Community Rating

Average

9.5

238 votes submitted.

You Say

-

Ratings closed.

Highest Rated (2 agree) 10/10

No Half-Life or FPS player would hate this mod! Awesome gameplay, a satisfying arsenal of weapons, the enemies... AND SO MUCH MORE!!! HL:OF rocks! \m/

Jan 7 2011 by DeathReaperGrim

Style
Theme
Sci-Fi
Players
Single Player
Project
AAA
Expansions
Half-Life: Blue Shift
Half-Life: Blue Shift First Person Shooter
Half-Life: Decay
Half-Life: Decay First Person Shooter
Required to play
Half-Life
Half-Life First Person Shooter
Embed Buttons
Link to Half-Life: Opposing Force by selecting a button and using the embed code provided more...
Half-Life: Opposing Force
Statistics
Last Update
Watchers
161 members
Mods
30
Addons
62
Files
43
Articles
22
Reviews
34