Install Engines

Download O3DE releases, pre-releases, and source builds from the launcher.

OPAL installs O3DE for you. The Engine Downloads page (reached from Engines → Download Engines) reads O3DE’s release metadata and presents every available build so you never have to browse the O3DE website for the right zip.

The Engine Downloads page

A two-pane layout: the release list on the left, release details on the right.

  • Platform filter — All, Windows, Linux, macOS, plus Source. (The Source option is hidden when Script-Only mode is on.)
  • Latest badge — marks the newest release for each platform.
  • Search — filter the list by version, source, or platform.
  • Installed / downloading indicators — each row shows whether that release is already installed or currently downloading.

Select a release to see its details, then start the install. Official-release downloads run in the Downloads queue; source builds also run through the Builds queue.

Older versions and pre-releases

  • Older releases are simply lower down the list — pick any prior version.
  • Pre-releases are hidden by default. Tick Show pre-releases to surface development and stabilization/* branch builds.

Custom engine sources

Beyond the official releases, you can add your own download hosts — for example a studio’s internal engine builds.

Open Custom Engine Sources, add a host, and map its JSON release manifest:

  • Name — how it appears in the UI.
  • Manifest URL — the JSON release manifest.
  • Field mappings — which JSON keys hold the version, download URL, and release notes.

Each custom host shows its latest version and last-updated time, and a Check for Updates action refreshes them on demand. Custom-source releases appear in the list alongside official ones.

See also