Release Notes and Known Issues

What's New in Alexa Web API for Games

Version 1.1 introduces motion and sensing APIs to enable you to add motion to your games on the Echo Show 10. For details about these extensions, see Web API Extensions for Games Overview.

Supported devices

The following devices are supported. The Echo Show 10 is a motion-capable device.

Echo Family Devices

  • Echo Show (1st Gen)
  • Echo Show (2nd Gen)
  • Echo Show 5
  • Echo Show 8
  • Echo Show 10

Fire TV Devices

  • Fire TV Stick 4K
  • Fire TV (3rd Gen)
  • Fire TV Cube (1st Gen)
  • Fire TV Cube (2nd Gen)

Known issues

  1. Echo Show 8 is reporting an incorrect window.devicePixelRatio relative to window.innerWidth. When computing the physical pixels of the device by multiplying the innerWidth by the devicePixelRatio, the result is off by 1, i.e., computed 1281 px vs true 1280 px.

  2. On FireTV devices, when exiting with the back button on the remote, a sessionEndedRequest is sometimes not sent to the skill.

  3. In-skill purchase flow sometimes not resume the skill properly. Note: On FireTV devices, it's necessary to respond to the Connections.Response with Alexa.Presentation.HTML.Start.

  4. ThreeJS has a shader compiler bug with Echo Show (1st Gen and 2nd Gen) devices. See for a workaround.

  5. Wake word response set via skill manifest continues to persist on device outside of skill session.

Other resources