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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Sandbot v0.2.1

Sandbot v0.2.1

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...

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 4 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...

Half-Life 1 WON 1.1.1.0 Patch

Half-Life 1 WON 1.1.1.0 Patch

Patch 13 comments

With this, you can upgrade Half-Life versions and even downgrade it. You can only use this in the WON version.

Opposing Force Assault v1.4 Alpha Demo

Opposing Force Assault v1.4 Alpha Demo

Opposing Force Assault Demo 5 comments

This is an Alpha demo version so the game is not complete and will be longer , expect bugs , crashes ... ect. Bug reporting is always welcomed to improve...

Opposing Force: Source Models 1.0 Beta

Opposing Force: Source Models 1.0 Beta

Demo 2 comments

Ok before i say anything about this i need to say this: AW HECK YA ITS OUT!!! Its not out its just what i made so far OH that reminds me sense this is...

Half-Life: Opposing Force FGD for Jackhammer

Half-Life: Opposing Force FGD for Jackhammer

Mapping Tool 5 comments

This FGD file modified for the Half-Life: Opposing Force enables the visualization of models (weapons, enemies, items ...) in Jackhammer editing screen...

Half-Life: Opposing Force SP Map fixes patch

Half-Life: Opposing Force SP Map fixes patch

Patch 3 comments

Contains bug fixes for various map for Half-Life: Opposing Force - single player. To note that the structure of the maps isn't changed at all , only entities...

IWM

IWM

Improvement weapons models Full Version 0 comments

Full version. Improvement weapons models for Opposing Force.

Sledge Alpha Build

Sledge Alpha Build

Mapping Tool 5 comments

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 Dreamcast Strategy Guide

Guides 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 Uplink

Demo 13 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 Unofficial FAQ

Other 0 comments

An old Half-Life FAQ, downloaded from an archived Half-Life website.

Gearcraft

Gearcraft

SDK 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

Further-Data

Patch 2 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

Shepard's Adventures

Shepard's Adventures Full Version 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

Botman's Bots (HPB-BOT) 4.0

Other 8 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

Retaliation

Retaliation Full Version 3 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...

Dark Operations

Dark Operations

Dark Operations Full Version 2 comments

“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...

Little Sky Scraper of Horrors

Little Sky Scraper of Horrors

Little Sky Scraper of Horrors Full Version 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

Super Nova Space Station

Super Nova Space Station Full Version 4 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

Underhalls

Underhalls Full Version 2 comments

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

The Xen Campaigns

The Xen Campaigns

The Xen Campaigns Full Version 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

Ground Zero 2: Fallout

Ground Zero 2: Fallout Full Version 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...

A Soldier's Tale

A Soldier's Tale

A Soldier's Tale Full Version 1 comment

Unzip the files in this archive. Place the maps in your half-life/gearbox directory. Load up Opposing Force (using Custom game or whatever shortcut you...

Bootleg Squadrog

Bootleg Squadrog

Bootleg Squadrog Full Version 3 comments

Black Mesa, this is going to be dangerous mission.... I think I'll go do some training before I leave. I'll also need to choose the right weapon for the...

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Half-Life: Opposing Force
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