The policy change was discovered in an update to an existing Apple TV support document covering the use of game controllers, and highlighted by MacRumors' sister site TouchArcade as a revision that will surely be welcomed by developers and gamers alike.
The updated document now recommends to developers: "When designing a tvOS game, you may require the use of an MFi game controller, but where possible you should also support the Siri Remote."
The wording reflects a subtle but significant softening of the company's previous stance on Siri Remote controller support. At the launch of the fourth-generation Apple TV last year, Apple initially encouraged game developers to support the Siri Remote included with the device, but eventually hardened its stance by stipulating the support as a necessary requirement.
That vexed some developers who complained that the Siri Remote simply doesn't function well as a controller for more complex games that involve finer grained control and subtler movements.
The reversed stance therefore paves the way for developers to bring games to Apple TV that would have previously been considered unplayable on the platform.
On the flip side of course, it's also likely to mean that some games which subsequently appear in the Apple TV App Store will be out of reach of users who do not own a compatible third-party MFi game controller.
In related news, Apple yesterday demoed an updated Remote app for the fourth-gen Apple TV and tvOS which mirrors the functionality of the Siri Remote and also allows users to play games using their iPhone.
The company also used its WWDC 2016 keynote to announce an updated version of tvOS that includes new functionality and features for Siri, single sign-on and more.