Platforms

But will it Hyperion?

Where it runs

Platform	Status
Windows (x64, arm64)	Yes. Runtime and editor. DirectX 12 by default, or Vulkan.
macOS (arm64)	Yes. Runtime and editor.
Linux (x64)	Yes. Runtime and editor.
Web	Yes, through WebAssembly and WebGPU. Runtime only, built from the Windows editor.
Android	Supported - not stable yet.
iOS	Supported - not stable yet.
Steam Deck	Yes, through Proton. Input and resolution handling still need work.

Linux is newer than the other desktop platforms, so expect some rough edges. Contributions are welcome on this front (as well as anywhere else).

In this section

Packaging a buildBuild a standalone copy of your game to distribute.
WebBuild your game for the browser.
AndroidBuilding and installing on Android devices.
iOSBuild for iPhone and iPad through Xcode.

Steam Deck

On the Deck, run the Windows build through Proton. Controller input and resolution handling still need work here. The native Linux build hasn't been tested on the Deck yet.

Per-platform settings

Each platform can have its own config, like Config/EngineConfig.Android.json or Config/GlobalConfig.Web.json. If a platform file exists it replaces the regular one, rather than merging with it, so it needs every setting.

The mobile configs, for example, turn off ray tracing, DDGI, SSGI and TAA.

Device tiers

On top of the config, Config/DeviceTiers.hmf has rules that change settings for the device the game is running on. Each rule matches on any of:

Axis	Values
DeviceType	Desktop, Laptop, Mobile
DevicePlatform	Windows, MacOS, Linux, Android, IOS, Web
DeviceGrade	Low, Medium, High, Ultra

and overrides the EngineConfig settings it lists. When matches exact values, and AtMost matches a grade or anything below it:

TierRule "Web" {
    When = { DevicePlatform = Web }
    Set = {
        "Rendering.Glimmer.Probes.Enabled" = false
    }
}

The Mobile rule, for example, turns off Glimmer, SSR, clouds, fog volumes, shadows and bloom.

To test another tier, force an axis from the command line with --devicetype, --deviceplatform or --devicegrade, like --devicegrade=Low.