Obsidian Conflict is a cooperative multiplayer modification set in the Half-Life 2 universe.
It features a large amount of new gameplay features on all-new maps specially designed for the mod with focus on cooperative gameplay, as well as over hundred user-made maps following the same formula.

In addition to that, You're able to play through vanilla Half-Life 2 all the way up to Episode 2, as well as experimental support for cooperative Half-Life: Source play.

Key features:

- All Source engine Half-Life series games playable in co-op online (Half-Life: Source, Half-Life 2, Lost Coast, Episodes 1 & 2)
- A large set of included custom maps, some in the form of classic combat & teamwork puzzles and others offering extraordinary new gameplay experiences such as cooperative farming and fishing
- New weapons, including dual Uzis, Medkit, Sniper Rifle, the Alyxgun, the Tau Cannon, deployable Manhacks, as well as support for scripted weapons allowing use of weapons from Counterstrike and Day of Defeat Source
- New NPCs, including many from the original half-life such as a fully-functional ichthyosaur, as well as a working mortarsynth from HL2
- Special merchant NPC and related entities, offering gameplay where players can spend points from their score to purchase weapons and map-specific objects
- Many co-op related features, such as a server-side lives system, hud waypoints, player locator, attention & medic calls, and map objectives, as well as players' inventory carrying over between level transitions
- Great support for community mappers, including features like the mapadd system to easily edit existing maps without having to recompile them, as well as tutorials and prefab examples for all of OC's new entities and features
- Support for custom playermodels and custom colorizations on weapons and hud elements

Image RSS Feed Screens
WIP Map OC HUD Mockup Military Tablet

Unofficial mountfix

3 months ago News 7 comments

Hello everyone, we’d just like to inform you that our community member jfm created an automatic mountfix installer, big thanks to him!

Please note that it is not created by the OC team and we do not take responsibility for any damage it might do to your system.

It comes in 2 versions, one with a full OC installer included and one with just the mountfix.
Please make sure .NET Framework 4.5 is installed and you're running at least Windows Vista, XP is not supported.


Zipped versions, for those that want them:

So how does it work and what does it do?

  • Before installing, make sure you have SDK Base 2007 and all the games you want to mount installed and fully working in Steam.
  • Now, you either just run the full installer, which will execute the mountfix.exe once it’s done installing OC, or
  • place the mountfix. exe in your existing Steamapps/Sourcemods/Obsidian folder, run it, either type "client" or "server" and hit enter.

The server part installs and configures a basic server config setup for first time server admins and requires a login.
The login is required for SteamCMD and is NEVER stored.

For more information and credits, check this Readme.

Please note that the mountfix can take a long time to complete and it may seem like nothing is happening at all. Don’t close the window, this is normal! The window will close once it’s done.

What the mountfix does is it first scans for your installed games, extracts the content from their depositories and then creates symlinks in your steamapps\common\Source SDK Base 2007 folder.
This process is very hard disk-heavy and thus can take a long time to complete.

This also doubles the disk space taken for each installed, mountable game since the files now exist twice; once in the normal Steam depositories and once as unpacked files which OC can read.

We are still working on a proper hotfix, but until then, this is a good stop-gap measure if you or your friends want to get into some OC action right now.

Breaking the silence

Breaking the silence

1 year ago News 19 comments

We have a hotfix in the works to address some of the problems that have been plaguing OC the last few months, it will fix the now-broken mounting system...

Obsidian Conflict Devblog Video #1

Obsidian Conflict Devblog Video #1

3 years ago News 25 comments

We've been quiet for too long again, heck, we almost could have reused the news post from last Christmas by now. So, to break the silence, we present...

Merry Christmas!

Merry Christmas!

4 years ago News 7 comments

We wish you all a Merry Christmas and hopefully a happy new year from all of the OC Team! While we're at it we would like to give you some news about...

New team members, next stop: Steamworks!

New team members, next stop: Steamworks!

4 years ago News 19 comments

We have been somewhat quiet the last few months, but we hope to change that. From now on we will try to make more frequent news posts to keep people updated...

Obsidian Conflict is a cooperative multiplayer modification set in the Half-Life 2 universe. It features a large amount of new gameplay features on all-new maps specially designed for the mod with focus on cooperative gameplay, as well as over hundred...
OC 1.35 Unofficial Mountfix (Full installer)

OC 1.35 Unofficial Mountfix (Full installer)

3 months ago Full Version 2 comments

Full installer, installs 1.35 plus hotfix and does the mountfix automatically. For detailed instructions, check the mountfix post. (File updated 07.08.2015...

OC 1.35 Unofficial Mountfix (Mountfix only)

OC 1.35 Unofficial Mountfix (Mountfix only)

3 months ago Patch 0 comments

Stand-alone mountfix, for existing installations. For detailed instructions, check the mountfix post. (File updated 07.08.2015 19:00)

Obsidian Conflict 1.35 Hotfix #1 (Client)

Obsidian Conflict 1.35 Hotfix #1 (Client)

3 years ago Patch 13 comments

For mod client only, not required on dedicated servers. (Requires 1.35 Full.)

Obsidian Conflict 1.35 Hotfix #1 (Server)

Obsidian Conflict 1.35 Hotfix #1 (Server)

3 years ago Server 1 comment

For dedicated servers only, DO NOT INSTALL ON MOD CLIENT!! (Requires 1.35 Full.)

Obsidian Conflict 1.35 Full Installer

Obsidian Conflict 1.35 Full Installer

5 years ago Full Version 96 comments

Note: The playermodel installer is currently unavailable. Just hit "Cancel" during that dialog pop-up and the installer will continue properly.

Obsidian Beta 1.34 Full

Obsidian Beta 1.34 Full

6 years ago Full Version 27 comments

Note: Only choose "Install client only" or the mod wont install properly.

Post comment Comments  (670 - 680 of 737)
mark008 Feb 11 2007 says:

ahhh! this mod rockz!!@

+1 vote     reply to comment
skidz Jan 9 2007 says:

Thank you all for the Comments, we will continue to improve the mod. :)

+1 vote     reply to comment
skidz Jan 9 2007 says:

Xmeagol: I'm no crazy coder, but porting those npcs over wouldn't be as hard as you think. Valve have made it surprisingly easy to create path finding AI of any type.

+1 vote     reply to comment
UnKn0wN Jan 7 2007 says:

:|:|:/:/how do i get my mod to work on my server and how do i get my server on the server browser list on half life 2 deathmatch?:/:/:|:|

+1 vote     reply to comment
AmdGamer Jan 6 2007 says:

This is that kind of mod Ive been looking for ever. Its really fun to play this on lan with friends. Some of the maps didn't work really well tought, but that doesn't matter.

The lives system was kinda buggy, I had 9 lives and my friends had 4 when we started a game with lives. No matter if I changed the amount of lives, still that way.

Id like some Co-op defence maps. You know, like 100 antlions / zombies attacking a small base / a house in the desert / in the forest. And some NPC soldiers and turrets to defend too. There was one map like this, but it had like 1 antlion coming in per minute, which died in few seconds. And it wasn't defence, it was capture the supplies. Fun anyways.

I couldn't get the console work with this mod. Don't know why, it works on all the other mods.

Best map we have played now is oc_antlion_attack. Downloaded it from the forums, can't remember who made it. Its great, thought it needs more NPC turrets or NPCS. Still better than any map on this mod.

Anyways, I rate the mod 10/10.

+1 vote     reply to comment
skidz Nov 20 2006 says:

Sorry guys, uploaded 1.21 to moddb and updated the news. Added acouple misc screenshots of gameplay.

+1 vote     reply to comment
Kinhoshi Nov 14 2006 says:

I'd do it, but I'm not sure if I should. Here's a link to it until it is uploaded. Gamerzunlimited.us (Patch)
Gamerzunlimited.us (Full 1.21 install)

+1 vote     reply to comment
Leedeth Nov 10 2006 says:

You guys need to add v1.21 to moddb...I was gonna download v1.2 here but then I checked your website, and now I'm downloading v1.21.

+1 vote     reply to comment
mark008 Oct 21 2006 says:

OH MY ******* GOD!!! S.T.A.L.K.E.R is HELL scary!!! i recommend buy it quick as you can! i played alpha verision... and i rate game like: HOLY ****! IM ****** ON MY PANTS! THIS IS REALLY SCARY GAME EVER! and its awesome! MUCH of vehicles! (russian and ukraine vehicles!)... and much of scary places and enemies!! really! im sure you all **** on pants when play it!

+1 vote     reply to comment
mark008 Oct 16 2006 says:

mmm ok lol

+1 vote     reply to comment
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Official Page
Release Date
Released 2008
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618 votes submitted.

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Highest Rated (9 agree) 9/10

Nice option, almost perfect co-op mod and with a lot more options than Synergy. You should try it. :D

Dec 3 2010 by Killer_man_1996

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