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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New decade, new article


Hello again everybody. It's about time we did another news update, isn't it?

After the summer media update, we kept working on the internals of the mod and at this point, almost all the big bugs like game crashes are gone. With the only remaining bugs being some smaller ones, we are once again able to focus on improvements and new features.

For those who haven't seen the news on our Discord back in the day, we have begun beta testing on Steam in late October. This is a small but important step for us, as we have finally surpassed all the progress we did since back in 2013. This event is another milestone of our work and further proof we are drawing close to the release.

You might remember that in our last media update, we announced the collaboration between Obsidian Conflict and Half-Life: Co-op. It's time to reveal one of the fruits from it:

Unified Half-Life: Source maps


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Originally made by Mr. Lazy for Half-Life: Co-op, the maps are undergoing extensive overhaul by our teams, notably solving long time HL:S and HL1 problems, restoring the original GoldSrc lighting*, optimizing the maps, porting and fixing the correct textures and much more, with the planned addition of the PS2 map improvements**.

These enhanced maps, together with their VMFs and the special lights.rad files will be released once completed and made available both for Half-Life: Co-op, Obsidian Conflict and Half-Life: Source itself.

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For those curious about how different the maps are compared to the HL and vanilla HL:S maps,we have created an album comparing them.


As our current efforts are focused on polishing the code and on the HL:S maps, we are looking for mappers to aid us in updating and improving our official maps ( the ones that require it, anyway ).

To help us coordinate work on pending tasks we've made a Trello board available. Now people who want to help us can easily pick, request and check tasks that suit their skill set the best. You know what they say - divide and conquer!

To preempt the question - you don't have to jump through the hoops of joining the team to help us out. Just contact us on Discord - every last bit of help is appreciated!

Here are the most recent community additions that made it into the mod:
User Posted Image
TOZ-34 Annabelle replacement, made by AsG_Alligator and Nicole Vlodhammer


User Posted Image

HD HL1 Crosshairs, by MrFloyd


User Posted Image

New “HL2 Houndeye” skin, by Shift and Cvoxalur


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Compact loading bar config, by D4 / Jai the (Perth) Fox


Even if you don’t see a certain task listed, feel free to ask, there are always different ways to help!


As a final note, this time there isn’t a new DevBlog video. A lot of changes can only be appreciated while playing, and it didn’t feel right to record only new / improved models and animations.

Thank you once again for your support, we will see you soon!

*Thanks to Slartibarty’s compile tools, there are several new VRAD options that allow us to produce results closer to their original appearance in GoldSrc engine ( on Software render, which has overbrighting ).

Due to differences with Source lighting, and other factors like having to roll different lighting settings into a single map, we can’t perfectly replicate the original appearance, but we are happy with the current results.


**The PS2 maps provide a few improvements, such as improved brushwork or using models. Those specific improvements may come post release, however.

Obsidian Conflict 2019 summer update

Obsidian Conflict 2019 summer update

News 9 comments

For those who aren’t present in our Discord, you might be wondering what happened during the last nine months. Why have we returned to radio silence...

Obsidian Conflict Fall 2018 media update

Obsidian Conflict Fall 2018 media update

News 11 comments

It has been five months since we announced our comeback, let us show you what we've been working on since then!

Obsidian Conflict is back on track

Obsidian Conflict is back on track

News 37 comments

Long time no see, huh? It’s already been eight years since the release of 1.35 in 2010, six years since the release of the 1.35 hotfix in 2012 and three...

Unofficial mountfix

Unofficial mountfix

News 9 comments

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

Add file RSS Files
OC 1.35 Unofficial Mountfix (Full installer)

OC 1.35 Unofficial Mountfix (Full installer)

Full Version 21 comments

Full installer, installs 1.35 plus hotfix and does the mountfix automatically. For detailed instructions, check the mountfix post. (File updated 03.11.2019...

OC 1.35 Unofficial Mountfix (Mountfix only)

OC 1.35 Unofficial Mountfix (Mountfix only)

Patch 2 comments

Stand-alone mountfix, for existing installations. For detailed instructions, check the mountfix post. (File updated 03.11.2019)

Obsidian Conflict 1.35 Hotfix #1 (Client)

Obsidian Conflict 1.35 Hotfix #1 (Client)

Patch 14 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)

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

Full Version 97 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

Full Version 27 comments

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

Comments  (0 - 10 of 767)
stevenr380680
stevenr380680

I have to wait for the real game to come out. My computer does not like the 1.3.5 version. Keeps not responding.

Reply Good karma Bad karma+1 vote
Guest
Guest

Keep it up

Reply Good karma Bad karma+4 votes
Guest
Guest

разработчики пожалуйста не бросайте проект как сделал гейб со 3 хайф лайф выпустите мод в стим я 10000000% куплю игру.

Reply Good karma Bad karma+3 votes
drvgbugz
drvgbugz

Hopefully you guys are still running strong, that would suck if you guys died again.

Reply Good karma Bad karma+4 votes
goirdin
goirdin

I'm a bit late, but I'm so glad to see the news that some work is still going into this mod! It remains my favorite multiplayer HL2 mod to this day, so many good memories on OC.

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shadow203
shadow203

So if am correct this mod serves as a spiritual successor to "Sven Co-op"?

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Guest
Guest

Yes but actually no.

Reply Good karma Bad karma+2 votes
Tabijaky
Tabijaky

this should be on steam

Reply Good karma Bad karma+7 votes
[MC]Pimpão
[MC]Pimpão

hopefully it will be. bringing it to steam would drastically increase the servers population. i remember Fistful of Frags had almost no one playing during it's last days as a hl2 mod but then it went to steam as a standalone game and just blew up

Reply Good karma Bad karma+2 votes
Krychur
Krychur

can't wait for the update. those new models look nice.

Reply Good karma Bad karma+4 votes
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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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Latest tweets from @obsidianmod

Whomobile did a great video of Diving ( plus a glimpse of the recently discovered version 10, which was never relea… T.co

Apr 22 2020

Obsdian Conflict 2020 mini media update Obsidianconflict.net T.co

Feb 4 2020

Obsidian Conflict 2019 summer update Obsidianconflict.net Youtube.com

Aug 2 2019

Happy Pride Month! T.co

Jun 2 2019

It has been five months since we announced our comeback, let us show you what we've been working on since then!… T.co

Oct 28 2018

Fall 2018 media update: Obsidianconflict.net Youtube.com

Oct 27 2018

Obsidian Conflict DEV blog video #3: Youtu.be via @YouTube

Oct 27 2018

We're excited to have an early version of the upcoming Steam release of Obsidian Conflict playable at this weekend'… T.co

Oct 4 2018

RT @gabeslovetub: Getting ready for take off! T.co

Jun 8 2018

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