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Download & Installation

MD Engine is available on Steam and the Two Black Cats store.

Standalone builds from the Two Black Cats store require license activation. Steam manages installation and access through the Steam client.

Platform Notes​

Windows​

Use Windows 10 or later (64-bit).

Linux​

The standalone Linux build supports AppImage packaging. If your download includes an .AppImage, make it executable with chmod +x and run it. Replace MD_Engine.AppImage in the commands below with your downloaded filename.

Depending on your permissions and the path you are running the AppImage from, the system may not be able to mount or extract it. If you get errors like AppImages require FUSE to run or permission-related failures, you can extract the AppImage and run it directly:

./MD_Engine.AppImage --appimage-extract
./squashfs-root/AppRun

This extracts the contents into a squashfs-root folder, bypassing the need for FUSE or special mount permissions. This is also useful on systems where FUSE is not installed or when running from paths like network drives or noexec-mounted partitions.

If you are using a Wayland-based desktop and experience display issues, try launching with the --ozone-platform-hint=auto flag or setting the GDK_BACKEND=x11 environment variable.

macOS​

Steam installs the Apple silicon build by default. On an Intel Mac, select the Intel Mac branch in Steam. For a direct download, choose the build for your Mac. Open the .app bundle; if macOS blocks it, follow its instructions.

Troubleshooting​

The editor launches but the screen is blank or white​

Check that your system meets the published requirements and try updating your graphics drivers. If the problem persists, include your OS and editor version when reporting it.

Build fails with "compiler not found"​

The build tools are bundled with MD Engine. On Steam, use Properties > Installed Files > Verify integrity of game files. For a standalone installation, reinstall the package from your account if bundled files are missing.

The Play Window doesn't open or shows a black screen​

Check the Build Log for an export or emulator error, then restart the editor. Include the error text when reporting a problem.

General tips​

  • Check the System Requirements page to make sure your machine meets the minimum specs.
  • If you experience performance issues with large projects, hiding unused scenes in the world view can help.
  • The Build Log contains detailed information when something goes wrong during compilation.