Skip to content


Folders and files

Last commit message
Last commit date

Latest commit


Repository files navigation

Table of Contents


A third-party launcher for your favourite MMO


Bolt, as well as the other Linux community projects, is being discussed at 7orm's Discord server. If you want to talk about development or need help getting set up, that's the place to go.


For Linux/Steamdeck users, Bolt is available on the following package managers:

  • flatpak: com.adamcake.Bolt
  • AUR: bolt-launcher

Others should see the "releases" section on the right.


If you just want to get Bolt installed then you don't need to build it from source! See the "Installing" section.

But if you do want to build from source, the first thing you should know is that Bolt is based on Chromium Embedded Framework (CEF), so to build it, you'll first need either to build or download a binary distribution of CEF.

Clone this repository with submodules:

  • git clone --recurse-submodules

If you accidentally cloned without submodules (no modules directory), you can checkout submodules like so:

  • git submodule update --init --recursive

Place your entire CEF binary distribution folder inside the cef directory with the name "dist", or create a symbolic link with the same effect.

If building on Linux, the following are required:

  • X11 development libraries (libX11-devel or libx11-dev on most package managers)
  • xcb development libraries (libxcb-devel or libxcb1-dev on most package managers)
  • libarchive development libraries (libarchive-devel or libarchive-dev on most package managers)
  • LuaJIT development libraries (luajit-devel or luajit-dev on most package managers) (OPTIONAL - only needed if you want to build the plugin library)

OPTIONAL: build the frontend. Bolt's html frontend is already committed to this repo in app/dist, so building it yourself isn't necessary. If you want to build it from source anyway then see app/ for full details on how this build system works, but here's the short version:

  • cd app/
  • npm install -g bun (needs root access on Linux)
  • bun install
  • bun run build
  • cd ..

Now you can start building. Open a command window or terminal in the root directory of this repository, then follow the build instructions for your platform.


  • cmake -S . -B build -D CMAKE_BUILD_TYPE=Release
    • note: you'll need to specify either -D BOLT_LUAJIT_INCLUDE_DIR=/usr/include/luajit-2.1 OR -D BOLT_SKIP_LIBRARIES=1 depending on whether you want to build the plugin library
    • note: build types "Debug" and "Release" are supported
    • note: if you have Ninja installed, specify -G Ninja for much faster builds
    • note: specify CC and CXX env variables at this stage to direct cmake to the C and C++ compilers you want it to use
  • cmake --build build
  • cmake --install build --prefix build
    • note: the last line creates a staging build in the build directory, this needs to be done between changing and running the program every time
    • note: if a --prefix is not specified, Bolt will be installed to /usr/local, requiring root privileges

After that, the helper script ./build/ can be used to launch Bolt from its staging location.


Windows builds have only been tested using Visual Studio 2022 (a.k.a. Visual Studio 17) in Release mode, per recommendations by chromium/cef. Other configurations may work but have not been tested.

  • optional: if you want to build the plugin library, start by cloning LuaJIT and build it by running msvcbuild.bat.
  • cmake -S . -B build -G "Visual Studio 17" -D CMAKE_BUILD_TYPE=Release
    • note: specify -D BOLT_CEF_INSTALLDIR=[your filepath] to specify the install location when running the final command. Must be an absolute path. The default is C:\bolt-launcher\.
    • note: depending on whether you want the plugin library, you need to specify either -D BOLT_LUAJIT_DIR=path/to/luajit/src/, where the path is the location of lua51.dll and the various lua headers, or -D BOLT_SKIP_LIBRARIES=1
    • note: use -A Win32 for 32-bit targets
  • cmake --build build --config Release
  • cmake --install build/

Run bolt.exe from the install location.


Not yet supported


When doing the initial cmake setup step, the following options exist which you may find useful. These are to be used for local development only.

  • -D BOLT_HTML_DIR=/some/directory: the location of the launcher's internal webpage content, $PWD/app/dist by default (note: must be an ABSOLUTE path)
  • -D BOLT_DEV_SHOW_DEVTOOLS=1: enables chromium developer tools for the launcher
  • -D BOLT_DEV_LAUNCHER_DIRECTORY=1: instead of embedding the contents of BOLT_HTML_DIR into the output executable, the files will be served from disk at runtime; on supported platforms the launcher will automatically reload the page when those files are changed


  • LuaJIT
    • When building, you may run into an error with 'luajit'. website
    • You can either install it by following the instructions on their website (or just via your package manager), or specify -D BOLT_SKIP_LIBRARIES=1 when building.
    • Keep in mind LuaJIT is based on Lua 5.1. If you have a Lua version later than that installed and Bolt is picking it up, the build will fail.
    • This comes from openssl1.1, which is reaching deprecation but is still widely used.
    • Install it with your package manager; it is usually called openssl1.1-devel or something similar.
  • JDK17
    • When attempting to launch, you may see an error about 'jdk17' in the console.
    • This can be solved by installing a couple packages with your package manager.
      Something similar to java-17-openjdk & java-17-openjdk-devel.
    • Another launch issue you may see in the console.
    • This is solved by setting the JAVA_HOME environment variable.
    • This is usually located in /usr/lib/jvm, so, it might look like this:
      export JAVA_HOME="/usr/lib/jvm/java-17-openjdk-"


There's not much to say here except that I have fairly high standards, so don't give me code that's messy or unfinished. Use a development environment that supports editorconfig before starting work. If committing to the frontend UI then see app/, especially the Linting & Formatting section, for some UI-specific guidelines. Follow the general etiquette of git, i.e. commit messages 50 characters maximum, all changes in a commit must be relevant to the commit, and all commits in a PR must be relevant to the PR.


Icons - Kia
Flatpak integration - @nmlynch94
Most of the UI - @smithcol11


Bolt is an unofficial third-party project and is not in any way affiliated with any of the games or companies it interacts with. Said games and companies are not responsible for any problems with Bolt nor any damage caused by using Bolt.

Bolt is NOT a game client. It simply downloads and runs unmodified game clients. Bolt has absolutely no ability to modify or automate gameplay.