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

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WIP Map OC HUD Mockup Military Tablet
Blog RSS Feed Post news Report abuse Latest News: Unofficial mountfix

7 comments by FlameOfHeaven on Jul 13th, 2015

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.

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OC 1.35 Unofficial Mountfix (Full installer)

OC 1.35 Unofficial Mountfix (Full installer)

Jul 13, 2015 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)

Jul 13, 2015 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)

Jan 23, 2012 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)

Jan 23, 2012 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

May 30, 2010 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

Dec 27, 2008 Full Version 28 comments

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

Post comment Comments  (0 - 10 of 734)
drugbugz Sep 3 2015 says:

**** i ******* know what happened to my computer this ******* game broke my computer god damnet it wtf my life sucks

+1 vote     reply to comment
Yoshii_FIN Aug 10 2015 says:

Help! CSS weapons are purple black for me, yes i do have CSS installed, and played, and i did check it was crossed in OC Mod options, but still, they are not working, including their sounds, plz i would like them to work again :c

+3 votes     reply to comment
thef Aug 30 2015 replied:

check and see if you have it active

+1 vote     reply to comment
sitrumvodoi Aug 7 2015 says:

steam greenlight

+1 vote     reply to comment
Denlo Jul 13 2015 says:


-1 votes     reply to comment
An_Unknown_Player Apr 8 2015 says:

lol a nice mod for those who don't have Half-life 2 and want to play it only co-operatively, so guys if you don't have Half-life 2 just download and install steam then download and install Source SDK 2007 Base from steam then download and install this mod where sourcemods folder is (usually under steamapps/sourcemods), Now you can play it without having to get Half-life 2 or any of it's episodes :3

+2 votes     reply to comment
supersonicbros369 Mar 21 2015 says:

I wish at least half of the old servers survived... can never find anyone to play it with like I used to. However, its true in that if you join an empty server, people will come forth, so its basically a matter of who makes the first move.

+4 votes     reply to comment
Guest Jan 30 2015 says:

This comment is currently awaiting admin approval, join now to view.

TheGamerErinomc Jan 14 2015 says:

are you able to use this for splitscreen (sorry if this is a stupid question :\)

+1 vote     reply to comment
Yoshii_FIN Feb 3 2015 replied:

Nope, many games in PC doesn´t have splitscreen anyway :/

+1 vote     reply to comment
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Release Date
Released 2008
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617 votes submitted.

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Highest Rated (8 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

First Person Shooter
Multiplayer & Co-op

Latest tweets from @obsidianmod

We just posted some news: "Unofficial mountfix" T.co

Jul 13 2015

RT @Nomaanism: My attempt at introducing @SlackHQ to my coworkers. T.co

Jun 25 2015

We just posted some news: Breaking the silence T.co T.co

Oct 8 2014

We just posted some news: Breaking the silence T.co

Oct 8 2014

@ViralHatred Donations are always welcome, tough we can't promise updates, we'll announce an update when it's ready tough...

Sep 9 2014

@Mryayayify maybe, maybe not, no one really knows

Jul 27 2014

If you want to know what's happening with the YaS server, follow @YaSOnline_ ;) ^NC

Jun 26 2014

@Mryayayify good question, too bad that probably no one has the answer currently...

Apr 30 2014

RT @BlackMesaDevs: Black Mesa - coming soon to Steam! T.co

Nov 20 2013

looks like T.co is back online, was a tough one to fix :/ -Neico

Oct 13 2013

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