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.

Sony, Microsoft and the great cross-gen debate

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

PS4 Crossplay No Longer in Beta, All Games Are Now Free to Add It

The PS4 Cross-Play Program Is Now Out of Beta, Says Report

PlayStation 4's new beta software reduces clutter, improves multitasking

Cross-Platform Play Now Finally Fully Supported On PlayStation 4 - GAMINGbible

Sony's PlayStation 4 Cross-Play Finally Exits Beta Stage

Fighting Games and Cross-platform Play, by Nathan Dhami

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

PlayStation 4 finally allows Switch and Xbox cross-play with Fortnite beta

Sony exec predicts cross-platform will come to other games 'over time' following Fortnite - Dexerto