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.

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Added | Game Name | Type
Sledge Alpha Build
Half-Life

Sledge Alpha Build

Aug 19, 2014 Half-Life Mapping Tool (2.84mb) 1 comment

Sledge is a completely free and open-source replacement for Valve's Hammer Editor, with a focus on compatibility with both Goldsource and Source engines...

Half-Life Dreamcast Strategy Guide
Half-Life

Half-Life Dreamcast Strategy Guide

Jul 3, 2014 Half-Life Guides (70.58mb) 2 comments

A Strategy Guide for the Half-Life Dreamcast version was written but never released. I have updated it on Moddb because it's not sold anywhere! It can...

Half-Life Uplink
Half-Life

Half-Life Uplink

Jun 16, 2014 Half-Life Demo (48.52mb) 4 comments

This is one of the two demos released for Half-Life. The first one, called Day One, was just shipped with certain video cards and never released to the...

Half-Life Unofficial FAQ
Half-Life

Half-Life Unofficial FAQ

May 9, 2014 Half-Life Other (0.15mb) 0 comments

I have found this Unofficial FAQ on an archived Half-Life website.

Gearcraft
Half-Life

Gearcraft

Apr 22, 2014 Half-Life SDK (1.46mb) 0 comments

Gearcraft is the level editor designed for use with Nightfire, and as such is better suited to level development than the older Hammer 3.5 ie it works...

Further-Data
Half-Life

Further-Data

Apr 1, 2014 Half-Life Patch (13.59mb) 3 comments

This is Further-Data, a small bonus CD released for free in 1999 via retail channels to Half-Life players. It contains bonus audio and music, lots of...

Shepard's Adventures
Half-Life: Opposing Force

Shepard's Adventures

Mar 31, 2013 Shepard's Adventures Full Version (2.70mb) 0 comments

Hello everybody! Here is my old single player map pack for Opposing Force. This mappack is more of the demo to my unfinished full-scale modification...

Botman's Bots (HPB-BOT) 4.0
Half-Life

Botman's Bots (HPB-BOT) 4.0

Jan 22, 2013 Half-Life Other (0.22mb) 4 comments

HPB BOT only for the following mods:Opposing Force,Deathmatch Classic,Team Fortress 1.5,Ricochet and of course Half-Life Only for WON versions Metamod...

Retaliation
Half-Life: Opposing Force

Retaliation

Aug 1, 2012 Retaliation Full Version (5.03mb) 2 comments

“Retaliation picks up where Dark Operations left off. There will be no Xen or displacer in Retaliation. Action is the main theme. It will mainly be an...

Dark Operations
Half-Life: Opposing Force

Dark Operations

Aug 1, 2012 Dark Operations Full Version (4.96mb) 1 comment

“It has several puzzles to make it more thinking oriented as well as being full of action. You will traverse and do battle in many different places: labs...

Little Sky Scraper of Horrors
Half-Life: Opposing Force

Little Sky Scraper of Horrors

Aug 1, 2012 Little Sky Scraper of Horrors Full Version (1.76mb) 0 comments

The Bad Guys have taken over a building in a Generic American City, and they’ve kidnapped some Innocent Scientists and forced them to genetically engineer...

Super Nova Space Station
Half-Life: Opposing Force

Super Nova Space Station

Jul 2, 2012 Super Nova Space Station Full Version (2.54mb) 3 comments

Find a way to escape of the space station, which has suffered some kind of containment breach. For English installation instructions, click description.

Underhalls
Half-Life: Opposing Force

Underhalls

Jun 24, 2012 Underhalls Full Version (0.85mb) 1 comment

A remake of the second map from Doom II for Half-Life Opposing Force. - By D_nawrocki

The Xen Campaigns
Half-Life: Opposing Force

The Xen Campaigns

May 26, 2012 The Xen Campaigns Full Version (9.78mb) 0 comments

The Xen Campaigns is a single player episode for Half-Life: Opposing Force. Included are 14 maps, some custom sounds, skins and some custom sentences.

Ground Zero 2: Fallout
Half-Life: Opposing Force

Ground Zero 2: Fallout

May 8, 2012 Ground Zero 2: Fallout Full Version (4.94mb) 2 comments

Before you install, you need to have Opposing Force and Half-Life installed on your machine. Backup your sentences.txt which is in your Gearbox/sound...

UTBM
Half-Life: Opposing Force

UTBM

Apr 21, 2012 Under the Black Moon Full Version (7.71mb) 2 comments

9 maps of tough goodness that will make a soldier cry for joy and or cry from the pain...

Intolerable Threat
Half-Life: Opposing Force

Intolerable Threat

Jan 9, 2012 Intolerable Threat Full Version (23.91mb) 3 comments

Hangar16 presents "INTOLERABLE THREAT" *INSTALLATION* Intolerable Threat requires a full installation of Half-Life and Opposing Force version 1.1.1.0...

Elements of War 1337 Board v8
Half-Life 2

Elements of War 1337 Board v8

Jan 2, 2012 Elements of War Full Version (0.61mb) 18 comments

Elements of War: 1337 Board is a HotkeyZ Menu based on Config.cfg from id Software's Quake engine and Valve Software's Gold Source and Source engines...

1337 Board v7
Half-Life 2

1337 Board v7

Jun 6, 2010 Elements of War Full Version (0.51mb) 88 comments

Hotkeys Menu! ModZ/Quake/HL/HL2/CS/CS:S/L4D/L4D2/PortaL/2/Dark Messiah/Call of Duty/World of WarCraft Etc Etc Etc...!!!

Valve Icon Pack
Counter-Strike

Valve Icon Pack

Mar 26, 2010 Counter-Strike Other (4.16mb) 24 comments

Ok, so here is what some of you asked me for. The icons are 256x256 (eventhough the preview image its so low res not to show it) the look cool! Enjoy...

Soldier's Adventures FGD-file
Half-Life: Opposing Force

Soldier's Adventures FGD-file

Sep 22, 2009 Soldier's Adventures Mapping Tool (0.02mb) 4 comments

Fgd-file different from standard opposing force.fgd only by possibility to show 3d models in Valve Hammer Editor, as it is possible in Valve Hammer Editor...

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Half-Life: Opposing Force
Platform
Windows
Developer
Gearbox Software
Engine
GoldSource
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Release Date
Released Oct 30, 1999
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Soldier's Adventures FGD-file
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