Which, as per the announcement
, "will be open to all engines, all platforms, and all stores". Very cool, and this comes directly from Epic's own Fortnite development which features cross-platform play, saves, and progress across 7 varying bits of hardware for over 200 million players. So, odds are these tools and resources will become the gold standard.
Epic plans to launch and make these cross-platform tools available throughout 2019 as per the following release roadmap.
Cross-Platform Login, Friends, Presence, Profile, and Entitlements (coming Q2-Q3 2019 to PC, other platforms throughout 2019): Provides the core functionality for persistently recognizing players across multiple sessions and devices; identifying friends; and managing free and paid item entitlements. This will support all 7 major platforms (PC, Mac, iOS, Android, PlayStation, Xbox, Switch) to the full extent each platform allows per-title.
PC/Mac Overlay API (coming Q3 2019): Provides a user interface for login, friends, and other features in a game-agnostic, engine-agnostic way.
Cross-Platform Voice Comms (coming Q3 2019 to all platforms): Epic is building a new in-game voice communications service supporting all platforms, all stores, and all engines, which will be available for free. (For developers needing an immediately-available voice solution, check out Discord, Vivox, TeamSpeak, Ventrilo, and Mumble.)
Cross-Platform Parties and Matchmaking (coming Q3-4 2019 to all platforms)
Cross-Platform Data Storage, Cloud-Saved Games (coming Q2 2019)
Cross-Platform Achievements and Trophies (coming Q3 2019)
This is excellent news, and sees Epic Games take the immense global success of Fortnite - which forced Sony to allow cross-platform play on the PlayStation 4 - to lead the charge in bringing down platform barriers. It's the first step toward a truly open future when it comes to online multiplayer gaming. Awesome.