As you may already know, the Black Mesa Research Facility from the first Half-Life game is situated in New Mexico, as well as the Fallout 3 game in the Washington D.C. If you look at the modification title, you can notice that this project is simply a combination of these two games. And you're not far from the truth...

Now let me warn you - this is not a Half-Life remake and never will be. This modification is just a fiction based on an idea "What if the Black Mesa Research Facility was situated in Fallout 3 world?" In other words - the main aim of this modification is to (re)create the familiar feel from the original Half-Life gameplay. And of course to give a small tribute/reminder to one of the best games ever made.

So, if you're a Half-Life fan too, I think you might enjoy this little adventure - I've added there as many Half-Life references and other related stuff as possible. If you're not a fan, but you like exploring new locations, you can actually enjoy the modification as well. Lastly, if you didn't play original game, you have a chance to see how approximately Half-Life looks.

1. Download the archive and extract its contents to the "Fallout 3\Data" folder.
2. Enable the BlackMesaDC.esm file from the Fallout Launcher or the Fallout Mod Manager.

Additional informations:
- The modification requires the latest patch, all DLCs, and FOSE.
- There should not be any incompatibilities with other modifications, but if you encounter any problems with something anyway, feel free to contact me.

Gameplay tips:
- The modification is not lore friendly - leave your companions at home.
- The starting location of the adventure is located south of Dunwich Building (if you have problems to find it, look at one of the screenshots in the gallery).
- Enemies found here can be relatively tough, especially for low level characters, so definitely don't go down there if you just left your birth Vault.
- If you're familiar with original Half-Life game, the modification should be slightly easier for you.

I'd like to thank to:
- Bethesda Softworks for their Fallout 3 game and marvelous G.E.C.K. editor.
- Valve Corporation for their Half-Life game.
- everybody who helped me with development, including the modders whose content I used:


- special thanks to Mktavish for his enthusiastic support and help.
- very special thanks to an unknown author who created the "Lambda Boy" logo I decided to use as a mod logo.

It's been a while since I started to work on this modification, so there's some chance I forgot to mention somebody. If it's you that deserves a credit, please, let me know, and I'll write your name here immediately.

Frequently asked questions:
Q: What type of mod is this?
A: It's combat/survival feature with some adventure elements packaged in the size of a DLC.

Q: Is the Xen included in the mod?
A: Notice the mod's title - it will answer everything.

Q: Why can't I play with my companions?
A: Layout in some locations is too complex - it may lead to an unpredictable NPC behavior.

Q: The mod is pretty boring. I'd like to add/change/improve something. What should I do?
A: If you got some ideas or skills (or both), the best thing you can do is to contact me.

Q: What?!? This is not Half-Life! Where are Headcrabs, Vortigaunts, Houndeyes, G-Man...?!?
A: Please read the introduction.

Q: The mod is bugged as hell! What should I do?
A: If you find any issues of all kind, contact me, and I'll do my best to fix them as soon as possible.

Q: The mod logo is somehow misleading. There's not Gordon Freeman in the mod, right?
A: Indeed. The logo is just an easter egg that binds both games together.

  • View media
  • View media
  • View media
  • View media
  • View media
  • View media
Post article RSS Articles


Hey there! Welcome to this week's roundup of the YouTube, where we covered an anthology mod and a mashing together of two retro sci-fi universes!

Monday - Playthrough - Jackie's Tapes

Cry of Fear is a total conversion like few others - more of a standalone game than anything, with its own small but passionate modding community. Jackie's Tapes - a spin-off of the popular Epilogue mod - expands on the twisted chronology of the game with anthology stories, the first of which is available, delving back into the nightmare...

sinner 3

Wednesday - Shorts - Mythlink

Mythlink is a VR-only monster battling game - a Pokemon adjacent experience where the bond between player and their chosen monster sidekick is the key to success. A series of competitive modes will challenge players' strategy and encourage them to develop their bond to achieve victory!


Friday - Playthrough - Black Mesa D.C.

Fallout is a series knee-deep in retro-sci-fi futurism, with plenty of weird beasties and unambiguously awful people populating the wasteland. Fallout 3's vaults are perhaps some of its more memorable environments, and Black Mesa D.C. does a good job illustrating that Half-Life's setting wouldn't be out of place in the vaults of the game.

Black Mesa D.C. Screenshots

That's all for this round-up. What do you think about the mods listed? Feel free to discuss below and check out the YouTube for more videos past, present, and future!

Mod DB Follow us on Twitter Fan us on Facebook Watch us on Youtube Join us on Steam

GOG Running We Love Games Sale; 5 Mods For The Games We Love

GOG Running We Love Games Sale; 5 Mods For The Games We Love

Feature 2 comments

GOG is running a big sale to celebrate the Valentine's period, so here's five games we love from the sale and a mod for each!

Add file RSS Files
Black Mesa D.C. v1.1

Black Mesa D.C. v1.1


Patch v1.1 (released 15.10.2019) - fixed LOD. - fixed some cosmetic issues and bugs.

Black Mesa D.C. v1.0

Black Mesa D.C. v1.0

Full Version

Let's put it straight: Half-Life + Fallout 3 = Black Mesa D.C.


so when the version for fallout 4 plus would be cool to make it a reality

Reply Good karma Bad karma+1 vote

for some reason everything is missing (red box with exclamation mark)

Reply Good karma Bad karma+1 vote

im so STUPID i dwonloaded 1.1 only and it was a patch

Reply Good karma Bad karma+1 vote

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


Rise and shine, Mr Freemen. Rise and smell the ashes.

Reply Good karma Bad karma+1 vote

This Half Life DLC lookking lit

Reply Good karma Bad karma+2 votes
Post a comment
Sign in or join with:

Only registered members can share their thoughts. So come on! Join the community today (totally free - or sign in with your social account on the right) and join in the conversation.


Black Mesa D.C. has not been tagged yet.