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Party dungeon crawler

Early access

Download Darkfiber

Download now for PC and Mac

A first-person, grid-based party dungeon crawler in a datacenter that died generations ago and never switched off. Roll a party of up to six in Faraday, the shielded town at the top of the lift, ride the freight lift down into the dead sublevels, and fight in ranks down the corridor you are standing in.

Six classes, 127 protocols, 57 enemies and six hand-built sublevels so far. 5E compatible. Play signed in, with your saves kept on the server, or offline with no account at all.

Download for Windows Download for macOS

The tech stack

Rules engine
A pure engine that knows nothing about the screen: state, a command and a seeded random stream in, the next state and a list of events out. Every die comes from that one stream, so any fight replays identically from its record.
Client — Godot
Walks the grid, draws the corridors and the fights, and turns the engine’s events into animation, sound and the combat log — none of which can change an outcome.
Server — Laravel on PostgreSQL
Accounts and cloud saves. Every save is checked against the same game data the client runs on before it is kept, and a save that fails overwrites nothing.
Offline play
Three slots on your own machine, kept apart from the account’s, because the server cannot vouch for progress it never saw. No sign-in needed.
Content as data
Classes, protocols, enemies, items, prices and floors are JSON the engine reads, never numbers in its logic — so the server validates against exactly what the game plays.
Platforms
Windows 10 and 11, 64-bit, with a Vulkan graphics card; macOS 11 or later as one universal build for Apple silicon and Intel. Android is planned, later.

Download

Fetching the latest build’s details. If the download buttons are not here in a moment, reload the page.

One zip per platform. Pick yours and follow its steps — neither build is signed with a paid certificate yet, so your operating system will warn you the first time, and the steps say exactly what that looks like.

Installing on Windows

64-bit Windows 10 or 11, and a graphics card with Vulkan support.

Download unavailable right now

The Windows build is not signed with a paid code-signing certificate yet, so Windows does not know who made it and says so the first time it runs. That warning is expected; it is not a sign that anything is wrong with the file. The checksum above is how to be sure the zip you have is the one published here.

  1. Download Darkfiber-windows.zip. If the browser says it “isn’t commonly downloaded”, choose Keep.

  2. Right-click the zip and choose Extract All. Don’t run the game from inside the zip.

  3. Open the folder and run Darkfiber.exe. (Darkfiber.console.exe is the same game with a log window beside it, for reporting a bug.)

  4. The first time, Windows SmartScreen may say “Windows protected your PC”. Click More info, then Run anyway. It asks once for each new build.

  5. To update, delete the old folder and extract the new zip. Cloud saves live on the server; offline saves live in %APPDATA%\Darkfiber and survive.

Installing on a Mac

macOS 11 or later. One universal build runs on Apple silicon and Intel Macs.

Download unavailable right now

The Mac build is not notarised by Apple yet — that takes a paid developer account — so macOS will refuse to open it the first time, and the wording sounds worse than it is. That refusal is expected. Steps three and four are the one-time way past it, and the checksum above is how to be sure the zip is the one published here.

  1. Download Darkfiber-mac.zip and double-click it to unzip it. Safari may have done that for you already.

  2. Drag Darkfiber.app into Applications.

  3. Open it. The first time, macOS refuses: “Apple could not verify Darkfiber is free of malware”. Click Done — not Move to Trash.

  4. Open System Settings, then Privacy & Security, scroll down to Security, click Open Anyway beside the Darkfiber line, and confirm with your password. It opens normally from then on. (On macOS 14 and earlier, right-click the app, choose Open, then Open again — that does the same thing.)

  5. If it still won’t open, or says the app “is damaged”, run this once in Terminal and try again:

    xattr -dr com.apple.quarantine /Applications/Darkfiber.app
  6. To update, replace the app in Applications with the new one. Offline saves live in ~/Library/Application Support/Darkfiber and survive.

Licence

This work includes material taken from the System Reference Document 5.1 ("SRD 5.1") by Wizards of the Coast LLC and available at https://dnd.wizards.com/resources/systems-reference-document. The SRD 5.1 is licensed under the Creative Commons Attribution 4.0 International License available at https://creativecommons.org/licenses/by/4.0/legalcode.

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