Multiplayer

Satisfactory can be played in multiplayer, with up to 4 players officially supported, but with no hard player-limit. The game is coop only and there will be no PvP elements. Currently, there are no dedicated servers, meaning that servers are hosted on the machine of one of the players, while they are playing, but there are plans to add them. As of February 2019, Multiplayer is in the alpha.

Cross-platform multiplayer is available across Steam and Epic Games.

Server options
When hosting a multiplayer server you can choose the following settings:

Privacy

 * Friends Only - Anyone on your friends' list can join your game without invitation. This also allows Session ID to be used.
 * Private - Players can only join your server if sent an invite.

There are no plans for a "Public" option, due to griefing concerns.

Network Ports
While network configuration shouldn't be necessary, you may open these ports to aid in troubleshooting network connections.


 * 5222 TCP & UDP
 * 6666 TCP & UDP

Also, make sure you didn't accidentally refuse the Windows firewall rules.

Session ID
Every online session has a set Session ID. Anyone who has access to this ID can join the session, as long as its privacy is set to Friends Only (despite the name, neither user does actually have to be in each other's friend list on either Epic or Steam).

This ID is unique to each session and is reset once the game is quit to the main menu or entirely.

Sessions with more than 4 players
In order for more than 4 players to be able to play in one session simultaneously, the game's config has to be edited.

The host has to navigate to  and add the following lines to the end that file: [/Script/Engine.GameSession] MaxPlayers=X where X corresponds to the desired maximum amount of players.