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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"We've Got Hostile" - Expanded

"We've Got Hostile" - Expanded

Singleplayer Map 4 comments

I manage to mix maps from "We've Got Hostiles" chapter from Half-Life 1, now instead of 5 maps, they are mixed in only 2. I wanted to make them all in...

Red Slugs Battery V 2 0

Red Slugs Battery V 2 0

Weapons Model 2 comments

It glows. and with added non-glow-version. Made back in 2005.

The Original Otis

The Original Otis

Animal Model 6 comments

This is the original otis that is seen in the early version of opposing force and was converted into a player model but now you have the npc version of...

Modified 'skill.cfg' without using cheats

Modified 'skill.cfg' without using cheats

Prefabs 1 comment

this "modified skill.cfg without using cheats" scripted by Rainbowdash98

Improved High Definition Pack v2.5.3 (FINAL)

Improved High Definition Pack v2.5.3 (FINAL)

Models Pack 12 comments

Fully updated (but not official) version of classic Half-Life High Definition Pack, both with original and new models and sprites.

Trusty Pack:  Opposing Force

Trusty Pack: Opposing Force

Models Pack

This is the trusty pack opposing force ud pack found by r1chrd on the trusty crowbar facebook page, enjoy :D

Half-Life Opposing Force: Small Reanimation pack #2

Half-Life Opposing Force: Small Reanimation pack #2

Skin Pack 3 comments

Another small reanimation pack for Oposing farce, some reanimation are: Tripmines, RPG, Spore Launcher, Knife, and the other 2 are 9mmar and 9mmhandgun...

HL1 Music Replacement for OP4

HL1 Music Replacement for OP4

Music

I like Opposing Force's soundtrack, but I believe Kelly Bailey's HL1 score is better, so this is a music replacement pack!

Opposing Force little reanimation pack

Opposing Force little reanimation pack

Skin Pack 3 comments

I reanimated 4 of the weapons like Pipe wrench, SAW, Displacer, and Desert Eagle (re-uploaded because of missing sound file)

Half-Life: Opposing Force Trebuchet Fix

Half-Life: Opposing Force Trebuchet Fix

HUDs 3 comments

This mini-mod changes the HUD, or more specifically the health, armor and ammo digits and icons at the bottom of the screen to reflect the general design...

Half-Life Opposing Force - M40A1 Reanimation

Half-Life Opposing Force - M40A1 Reanimation

Weapons Model 1 comment

Welp, here it is, nothing to say about it, just A reanimation of M40A1 Sniper

Opposing Force Hz Pack

Opposing Force Hz Pack

Skin Pack 5 comments

This pack changes/adds:detail textures,models,sound,sprites,etc Since ProyectosHz page is down i am reuploading this for archival the password is ProyectosHZ...

Half-Life Opposing Force: Spas12/Shotgun Reanimated

Half-Life Opposing Force: Spas12/Shotgun Reanimated

Weapons Model 2 comments

Here is A quick reanimation i've done in A while, A sequel to the previous Opposing Force 9mmhandgun and 9mmar reanims, hope you enjoy

9mmar and 9mmhandgun reanimation v.2

9mmar and 9mmhandgun reanimation v.2

Weapons Model 2 comments

so I was bored because of not animating... and then i've made this. (Updated the 9mmar reload animation, and increase the fps of 9mmhandgun reloads)

HD Half-Life Crosshairs

HD Half-Life Crosshairs

HUDs 12 comments

An addon meant to help update Half-Life's older, low-res crosshairs to look nicer with modern HD displays, click "Read More" to see the difference!

USP with DiamonD Arms

USP with DiamonD Arms

Weapons Skin

Features Modified UV maps and textures for satisfaction with mesmerizing foley sounds of Strelok using DiamonD's Opfor Arm Textures

Default Desert Eagle Reanimated

Default Desert Eagle Reanimated

Weapons Skin 2 comments

default desert eagle animations are... meh, the model is terrible, and the firing sounds are weak. so, i have a replacement for it, with new animations...

mortise

mortise

Multiplayer Map

mortise a deathmatch map carved in solid binary rock. A recent project which was quite fun to make. Themed as an abstract yet in some way feasible industrial...

Nova's Tactical Male Black Ops Assassins V2

Nova's Tactical Male Black Ops Assassins V2

Animal Model 3 comments

Just a 2nd version of my tactical male black ops assassins model. Fixed the walkie-talkie and helmet

Barney Finger Restoration

Barney Finger Restoration

Players Model 4 comments

Restores Barney's fingers and makes other minor corrections.

Nova's Tactical Male Black Ops Assassins

Nova's Tactical Male Black Ops Assassins

Animal Model 2 comments

I decided to make the massn model look a bit more tactical by adding a helmet, walk talkie, a satchel on the back of massn's belt, and changed the color...

Valve's official HLDM/OP4DM PC content

Valve's official HLDM/OP4DM PC content

Multiplayer Map 1 comment

This is all of the official content that Valve/Gearbox has released for Half-Life and Opposing Force Deathmatch on PC that is NOT currently included on...

Valve's HLDM holiday models

Valve's HLDM holiday models

Players Model

Two long lost Valve-made Half-Life Deathmatch models.

Half-Life PS2 Hazard Course intro(includes LD mdl)

Half-Life PS2 Hazard Course intro(includes LD mdl)

Singleplayer Map 14 comments

Ported straight from the Playstation 2 version of Half-Life comes the Half-Life hazard course special intro! No longer will this special section of the...

Halls2 (HL 1 DM Map)

Halls2 (HL 1 DM Map)

Multiplayer Map

Halls2 was a Half-Life Deathmatch map created by Chris Ashton, co-founder of Turtle Rock Studios; developed while he was a member of Presto Studios. Halls2...

Hold down the Fort

Hold down the Fort

Singleplayer Map 1 comment

Inspired by a particular "game" that has quite the unfortunate fate, this map basically is a defense map where you have to stay alive for a long time...

Generic Testing Map for GoldSrc

Generic Testing Map for GoldSrc

Singleplayer Map

IT'S A GENERIC TESTING MAP, WITH A SKYBOX, WITH A SLOPE TEST, WITH A JUMP HEIGHT MARKER, WITH A LENGTH MARKER, WITH ALL THE HALF LIFE ONE GUNS! VIDEO...

Increased Fonts For HL1

Increased Fonts For HL1

GUIs 1 comment

This file contains fonts settings for HL1 which increases size of on screen text.

Female Scientists

Female Scientists

Models Pack 9 comments

This model pack contains 4 female Scientists in typical Black Mesa dress code. They are fully animated and use the standard hl1 Scientist Animations...

Valve/Gearbox HL:DM Collection (FIXED!)

Valve/Gearbox HL:DM Collection (FIXED!)

Multiplayer Map 8 comments

Update May 9th, 2018: Replaced dm_pumpkin and dm_santa with the proper original released models from Valve, rather than the community edited versions...

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Half-Life: Opposing Force
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Gearbox Software
Engine
GoldSrc
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"We've Got Hostile" - Expanded
"We've Got Hostile" - Expanded Singleplayer Map 8.96mb
Prefabs Pack
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Improved Gearbox Desert Eagle
Improved Gearbox Desert Eagle Weapons Model 180.6kb
Kimono's Glock 17
Kimono's Glock 17 Weapons Model 41.23mb
The Original Otis
The Original Otis Animal Model 750.32kb
Opposing Force Hz Pack
Opposing Force Hz Pack Skin Pack 265.33mb
Halls2 (HL 1 DM Map)
Halls2 (HL 1 DM Map) Multiplayer Map 231.03kb
Barney Finger Restoration
Barney Finger Restoration Players Model 1.85mb
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Female Scientists Models Pack 2.41mb
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Valve Hammer Editor 3.4 Singleplayer Map 2.04mb
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Pete's Franchi SPAS 12 Weapons Model 127.53mb
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