Relive Half-Life in this highly acclaimed, fan-made recreation
Recent Reviews:
Overwhelmingly Positive (2,284) - 97% of the 2,284 user reviews in the last 30 days are positive.
All Reviews:
Very Positive (16,006) - 94% of the 16,006 user reviews for this game are positive.
Release Date:
May 5, 2015

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Early Access Game

Get instant access and start playing; get involved with this game as it develops.

Note: This Early Access game is not complete and may or may not change further. If you are not excited to play this game in its current state, then you should wait to see if the game progresses further in development. Learn more

What the developers have to say:

Why Early Access?

“Making a game with the scope and scale of Black Mesa is a massive undertaking. Back in 2012 we made the decision to release what we had completed up to that point, and were blown away by the community’s response, feedback, and improvements to our work. We want to keep that relationship alive and well by using Early Access as a tool for allowing our community to participate in the final phase of Black Mesa’s development.

In addition, our ambitions go beyond the original Xen chapters found in Half-Life. We have a standard of quality that we have to achieve. Early Access allows us to commit resources to bring you the remaining chapters with the quality that you expect.”

Approximately how long will this game be in Early Access?

“We currently have the first ~85% of our single player campaign completed (8-12 hours). For the last 15% we want to not only recreate it, but improve upon it to make it an enjoyable and memorable experience.

Xen will be available soon in 2019”

How is the full version planned to differ from the Early Access version?

“The conclusion of the single player campaign, with the addition of the Xen chapters
Final polish on the Earth-based chapters of the single player campaign”

What is the current state of the Early Access version?

“Over 8-12 hours of single player campaign. Multiplayer deathmatch and team deathmatch with 8 completely re-imagined Half-Life 1 maps on the Source Engine.”

Will the game be priced differently during and after Early Access?

“Black Mesa will be $19.99 USD during the Early Access phase. This price will not change after we move out of Early Access.”

How are you planning on involving the Community in your development process?

“We intend to work closely with our community as we complete the final portions of Black Mesa. We started out as a modding team aiming to do true justice to a Half-Life: Source port, and we won’t forget our roots.

The Black Mesa game hub and forums will be the primary points of interaction with our users. Many team members regularly browse these areas to discuss ideas with the community, and to show progress on game development. Community feedback will be sorted into groups and taken into account as we develop.

We also support Steam Workshop, and will be watching and encouraging developments there.”
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Recent updates View all (40)

July 6

Some Release Dates

Hope everyone in the states had a good holiday, and everyone is having a good summer overall. We wanted to give an update on what to expect for Xen.

Thank you so much to everyone that played the technical beta and reported bugs! It was extremely positive and motivating for us. We have already fixed a large number of the issues reported, including some we never would have found on our own. The amount of quality feedback from our community has prompted us to update our release plans.

On August 1st we will roll out the complete Xen AND Gonarch's Lair chapters to public beta. Soon after (think weeks, not months), we will release the concluding chapters, Interloper, Nihilanth, and Endgame to public beta:

The same rules apply as before: If you want to be a part of cutting edge testing and don't mind helping us squash some bugs, this beta is for you! Otherwise, we suggest you hold out a little longer.

We think this staggered release will allow us to more thoroughly test all components of this massive game, and catch bugs faster. Once we can ensure a smooth launch, we'll push the whole Xen campaign out of beta for everyone to enjoy.

Thanks again for the feedback and comments. We will be back shortly with an update showing off some new stuff!

We are still on sale for 60% off until July 9th. As far as we know, this will be the last major sale before the release of Xen, so now is a great time to grab it for yourself or a friend!

Discord -

Twitter - @BlackMesaDevs

Facebook -
250 comments Read more

June 25

Xen Technical Beta

HAPPY STEAM SUMMER SALE! We have some big updates for everyone, and Black Mesa is 60% off.

Technical Beta
We are excited to release our tech beta! It’s the first 3 maps of the Xen chapter (which has 6 maps total), continuing Gordon’s adventure from the cliffhanger ending of Lambda Core. With the full Xen campaign clocking in at 19 maps, the beta is only a taste of what’s to come.

The purpose of this beta is to collect bugs and feedback on a range of different computers. We have made significant improvements and changes to the Source engine, and we want the game to run as smoothly as possible. If you want to be on the bleeding edge of testing, opt into this beta. If you want the polished, complete Xen experience, you should wait. It won’t be long!

How to Opt In
First right click “Black Mesa” in your game library. Go to Properties…

Then click the “BETAS” tab and select “public-beta” from the drop down...

It will download a bunch of stuff, then you will have access to the Xen levels for the beta!

If you have not unlocked all the chapters, you will need to enable the developer console and unlock them. Go to Options, Keyboard, Advanced, Enable Developer Console. Bring up the console and type “sv_unlockedchapters 19”.

From there, simply click “New Game”, then scroll over to the “Xen” chapter (the chapter images were intentionally left black).

Long Jump
The beta drops you in just after Lambda Core. A big part of the last fight in LC is teaching the player how to use the long jump. If you jump straight into Xen, remember the long jump is triggered by pressing the jump button (space) twice rapidly in ANY direction. You can then use the W, A, S, D to control Gordon in the air.

Bug Reporting
We are looking for specific graphical/technical/performance bugs, especially on lower end systems. If you have any issues, please report them on our Steam forums or on the “Xen-Bugs” Discord channel. Please include your graphics settings and system specs or we won’t be able to properly diagnose the problem.

Though our focus is performance, we are also interested in what was clear, and what wasn’t for the layout and design. If you got stuck somewhere or were confused by something, let us know.

Please unsubscribe from all workshop mods if you are testing!

Our Discord is live! Please join us, hang out, and chat. Make sure to check out the server rules. The TL:DR;, it’s a SAFE FOR WORK server about Black Mesa, Half-Life, and Games. Please keep discussions outside those categories to other servers and have fun!

PLEASE NOTE, we have heavy server restrictions at this time. We will dial it back as soon as possible.

Known Issues With the Beta
-Linux has not yet been built. Windows only.

-We have not tested all of Earthbound or Multiplayer for this beta. If you find issues, feel free to report them in the proper channels.

-Running the game at 4k resolution at max settings may drastically lower your frame rate

-Ragdolls freak out in water. If you shoot an Ichthyosaur or Hoteye in water, their body and gibs may freak out. This is fixed on the developer build.

-Plant lights don’t retract when you are near them. This is fixed on the developer build.

-Laptop screens show shadows that are behind the screen. Fixed on the developer build.

-Missing collision on some of the plants and roots in the swamp

-Cookie lights (lights that cast on the ground) are broken on the HEV battery. Fixed on the developer build.

-Players occasionally gets stuck on small healing pools

-Probably a few things we are forgetting. Feel free to report any bugs and we’ll add them to our tracker!
317 comments Read more
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“This is Half-Life updated just enough to make it palatable for contemporary tastes, but not so much as to deviate from the original vision.”
YES – Kotaku

“Black Mesa Source winds up being exactly what it always promised to be – a modernised, faithful recreation of a deservedly landmark first-person shooter.”
Rock Paper Shotgun

“It's a brilliant tribute to one of the greatest videogames ever made, and it's also a good game in its own right.”
8/10 – Destructoid

About This Game

Relive Half-Life in this highly acclaimed, fan-made recreation.

Black Mesa is the award winning re-imagining of Gordon Freeman's landmark journey through the Black Mesa Research Facility. Re-experience the game that raised the bar for the entire game industry all over again!

The over 10 hour single player experience has greatly improved from the mod release; new visuals, new voice over, updated gameplay encounters, stability changes and more. Xen is not part of the Early Access release, but will be included as a free update when it is ready.

Expect tremendously detailed environments, old-school tough-as-nails combat, and a gripping story with memorable characters. The all-new soundtrack, voice acting, choreography and dialogue create a more expansive and immersive experience than ever before!

Fight with or against your friends, in two game modes across 10 iconic maps from the Half-Life universe including Bounce, Gasworks, Stalkyard, Undertow and Crossfire!

Use the same tools as the developers! Create your own mods, modes and maps for Black Mesa and Black Mesa Multiplayer and then share your work, and subscribe to others, on the Steam Workshop!

Collect the full set of trading cards, backgrounds, emoticons, and achievements! Steam Cloud, Steam Workshop and partial controller support!

Run. Think. Shoot. Source.

System Requirements

SteamOS + Linux
    • OS: Windows® 7 (32/64-bit)/Vista or Greater
    • Processor: 2.6 Dual Core Processor or Greater
    • Memory: 6 GB RAM
    • Graphics: 2 GB Dedicated Video Card or Greater
    • DirectX: Version 9.0c
    • Network: Broadband Internet connection
    • Storage: 20 GB available space
    • OS: Windows® 7 (32/64-bit) or Greater
    • Processor: 3.2 Quad Core Processor or Greater
    • Memory: 8 GB RAM
    • Graphics: 3 GB Dedicated Video Card or Greater
    • DirectX: Version 9.0c
    • Network: Broadband Internet connection
    • Storage: 20 GB available space
    • OS: Ubuntu 14.0 or Greater
    • Processor: 2.6 Dual Core Processor or Greater
    • Memory: 4 GB RAM
    • Graphics: 2 GB Dedicated Video Card or Greater
    • Network: Broadband Internet connection
    • Storage: 20 GB available space
    • Additional Notes: Does not support the Nouveau display driver
    • OS: Ubuntu 14.0 or Greater
    • Processor: 3.2 Quad Core Processor or Greater
    • Memory: 6 GB RAM
    • Graphics: 3 GB Dedicated Video Card or Greater
    • Network: Broadband Internet connection
    • Storage: 20 GB available space
    • Additional Notes: Does not support the Nouveau display driver

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