Full Crossplay Support Comes to PS4 Starting With 'Fortnite

The open beta allows crossplay, progression, and commerce across the PS4, Android, iOS, Nintendo Switch, Xbox One, PC, and Mac platforms. 

How to play Fortnite cross-platform with Nintendo Switch, iOS, Android, PS4, Mac, PC, and Xbox

Sony is blocking Fortnite cross-play between PS4 and Nintendo Switch players - The Verge

How to Fortnite cross-play on PS4, Xbox One, PC, Switch, iOS, and Android

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

Cross-platform play - Wikipedia

Microsoft blames Sony over lack of Fortnite cross-play for Xbox One and PS4 players

An Epic cross-play journey: Paragon, Fortnite, and what comes next - Epic Online Services

Sony's Cross-Platform Lockout in Fortnite is Bad for Everybody, by Jared Lee, SUPERJUMP

OcUK Ultimate Crossplay Guide - Overclockers UK

Fortnite cross-platform crossplay guide for PC, PS4, Xbox One, Switch, Mac and mobile - Polygon

Fortnite PS4 Is Getting Cross-Play, Beta Starts Today

Sony CEO Speaks On PS4 Cross-Platform Play - Game Informer

PS4 Cross-Play Confirmed; Fortnite Beta Is Live - GameSpot

Sony didn't want cross-play on PS4 and PS5 — here's why