- Shooter
- Platform
- Puzzle
Game
Half-Life: Opposing Force
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, is sent in to neutralize the Black Mesa Research Facility after a scientific mishap causes it to be invaded by aliens, but quickly finds that the Marines are outnumbered and slowly being beaten back by a second alien race and black operations units.
About Half-Life: Opposing Force
- Released
- November 1999
- Developer
- Gearbox Software
- Publishers
- Sierra Entertainment, Valve
- Engine
- GoldSrc
- Series
- Half-Life
- Platforms
- Linux · PC (Microsoft Windows) · Mac
Where to get it
Release, studio and platform data from IGDB. Store links go to the sellers, not to us. We do not sell games and we do not host files.
Browse everything
Sorted, filterable and paged. Every link goes to the author’s own download.
- Mods730A mod changes the game itself. It needs something to load it, it may need other mods first, and it only works on the versions its author built it for.
- resource packs370A resource pack replaces the textures, sounds, models and language files the game ships with. It changes nothing about the rules, so it is safe on a vanilla server.
From the developers
Official announcements, newest first. Posted on Steam.
- Community AnnouncementsHalf-Life: Opposing Force update releasedAn update for Half-Life: Opposing Force is now available: Fixes Fixed end of game transition failing to run after defeating final boss Fixed grapple sound effects and alternate fire Fixed crash when target of a Gonome projectile is killed Fixed sniper rifle using wrong animations Fixed Desert Eagle laser disappearing when reload is triggered with a full magazine Fixed displacer ammo HUD icon Fi...
- Community AnnouncementsHalf-Life: Opposing Force update releasedA small update for Half-Life: Opposing Force is now available: Engine Fixed bug in skybox image loading Fixed bug in demo command processing Prevent certain path characters from being used in commands Enforce certain extensions be used for files specified in some commands
- Community AnnouncementsHalf-Life: Opposing Force update releasedWe have updated the public release of Half-Life: Opposing Force. Changes in this update are: Fixed crash when entering certain malformed strings into the game console. Thanks to Marshal Webb from BackConnect, Inc for reporting this. Fixed crash when loading a specially crafted malformed BSP file. Thanks to Grant Hernandez (@Digital_Cold) for reporting this. Fixed malformed SAV files allowing ar...
- Community AnnouncementsHalf-Life: Opposing Force update releasedWe have updated the public release of Half-Life: Opposing Force. Changes in this update are: Fixed crash when entering certain malformed strings into the game console. Thanks to Marshal Webb from BackConnect, Inc for reporting this. Fixed crash when loading a specially crafted malformed BSP file. Thanks to Grant Hernandez (@Digital_Cold) for reporting this. Fixed malformed SAV files allowing ar...
- Community AnnouncementsHalf-Life: Opposing Force update releasedWe have updated the public release of Half-Life: Opposing Force. This update contains all the changes from the recent beta, thanks to the whole community for their help with testing and suggesting new features. Changes in this update are: Converted Half-Life: Opposing Force to the new SteamPipe content system, for optimized delivery of the game Added support for Mac OS X and Linux operating sys...
- Community AnnouncementsHalf-Life: Opposing Force update releasedWe have updated the public release of Half-Life: Opposing Force. This update contains all the changes from the recent beta, thanks to the whole community for their help with testing and suggesting new features. Changes in this update are: Converted Half-Life: Opposing Force to the new SteamPipe content system, for optimized delivery of the game Added support for Mac OS X and Linux operating sys...
- Mods indexed
- 1.1k
- Versions
- 0
- Newest tracked
- none yet
- Most disruptive update
- No breakage data for this game
Most popular
This source publishes no download figure, so these are ranked by how many people saved or subscribed to them.
- Opposing Force HD Patch (Missing NPC)Skins / Packs
- Shephard UnmaskedSkins / Adrian Shephard
- Half-Life: Opposing Force Reanimation Pack LDSkins / Packs
- Half-Life: Opposing Force ImprovementsSingle Player
- female massn (as odd as it sounds)Skins / Male Assassins
- Opposing Force HD Patch #2 (Viewmodels & Monsters)Skins / Packs
- 1997/1998 OP4 H.E.C.U Style!Skins / H.E.C.U. Soldiers
- Restored Neural: Opposing Force VersionSkins / Packs
- Vanilla Map FixesSingle Player
- Half-Life: Opposing Force Reanimation Pack HDSkins / Packs
- HD hgrunts with HD animations (all of 'em)Skins / H.E.C.U. Soldiers
- Skinny OtisSkins / Otis
- Valve Styled HECU TroopersSkins
- OF5A4 consistent skyboxMaps / Other/Misc
- Remastered H-Grunts (Opposing Force Edition)Skins / H.E.C.U. Soldiers
- Hybrid Grunts (PS2 HD + PC): OP4 EditionSkins / H.E.C.U. Soldiers
- Adrian Shephard 4K Upscaled Menu and Custom FontMenu Background
- Adrian Shephard from the BetaSkins / Adrian Shephard
- Worlds Collide Loud Boxes FixSingle Player
- Clean Suit Scientists FixedSkins / Cleansuit Scientists
- Female Adrian Shephard!Skins / Adrian Shephard
- Improved Gearbox Desert EagleSkins / Desert Eagle
- Evil Eyes BlackopsSkins / Male Assassins
- HD Op4 Grunts Fixed & EnhancedSkins / H.E.C.U. Soldiers
Browse all 730 Half-Life: Opposing Force mods Sortable by downloads, rating and date.
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Why Half-Life: Opposing Force mods break
A mod is compiled against one version of a game. When the game updates, anything that reached into the parts that moved stops working, and it usually stops working silently rather than with a message that explains itself.
That is what the table above counts. It is not a guess: each row is a mod the community has reported as broken by that specific release. The number is a fair measure of how disruptive an update was, and it is the reason people delay updating a game they have modded heavily.
Common questions
Does IndexGG host Half-Life: Opposing Force mods?
No, and it never will. Every download link points at the author's own page on Nexus, GitHub, CurseForge or wherever they published it. We index the ecosystem; the files stay with the people who made them.
Where does the compatibility data come from?
From the communities that maintain it in the open, not from guesswork. Each claim carries how it is known, so a reported breakage is never presented as though the author said it.
Why is a mod listed as broken when it works for me?
Compatibility depends on your exact game version and the rest of your load order. A mod marked as broken in one release may work fine on an older one, which is exactly why the version is recorded next to the claim rather than a bare yes or no.