Multiplayer in Baldur's Gate 3 allows players to join others for cooperative only play, be it over the internet or via LAN. Baldur's Gate 3 Early Access supports 4-player online multiplayer, but split-screen will not be immediately available on launch. In 4 player online multiplayer, players can either start a multiplayer journey together and both create their own custom character (origin character will not be available as main player characters at the start of Early Access) or join a friends single player game during the adventure. In this case they will take over a companion.
Baldur's Gate 3 Multiplayer information
Is there Cross Play?
“Direct Connect” (yes) is possible between platforms - but all players must be on the same patch number in order for it to work. Note that in the first few weeks of Early Access there may be some minor version discrepancy between platforms as we move to fix and address issues rapidly, and in these cases you won’t be able to play between ‘stores’. Ultimately, you will.
Is there split-screen in Early Access?
Split screen will not be available on Early Access launch.
Is there a DM/GM mode in Early Access?
There will not be DM/GM mode in Early Access.
Voting System in Dialogue
In Baldur's Gate 3, you can play with your friends in story mode (just like Divinity: Original Sin 2). When your party encountered a major event, there will be a voting system to decide how your adventure proceed.
Info coming soon
I really hope they let you switch between players mid-dialogue, like you can in single player. It sucks when post-combat dialogues randomly pick the character who dumped CHA.