Sony's PlayStation 4 cross-play feature is out of beta and now available to all developers

The cross-play feature is now open to any game that supports it.

PS4 Cross-Play Exits Beta, Now a Full Feature For Developers - IGN

PlayStation Closed Beta, What You Need To Know

PS4 Will Support Crossplay on All Games

Sony Starts PS4 Fortnite Cross-Play Beta - Game Informer

Sony is bringing PS4 Remote Play to PC and Mac

Apple Document Suggests Sony Considered Bringing PS Now Gaming Service to Mobile Devices - MacRumors

Rocket League' Joins 'Fortnite' in the PlayStation Cross-Play Betas

PS4 Remote Play is (unofficially) coming to iPhone/iPad, beta testers wanted

Sony's PS4 4.5 update is out now. Here are its new features and how to download