How to start the multiplayer mode in No Man's Sky NEXT? No Man's Sky Guide
Last update: 03 August 2018
NEXT update for No Man's Sky adds the multiplayer mode. You can start it by selecting "Join Game".
After that you can see a new menu. Here, you can decide if you want to play with your friends - you can invite them by clicking on the table presented in the screen above.
Click on "Join Random Game" to join another player. Afterwards, the game will show you all your save files - choose one of them.
After choosing a save file for your multiplayer session the game will start loading your character. When it is done, you will spawn with your friends. It is possible that they will be on the other side of the system - the game spawns players randomly.
You can't make your game private by using a password. The only way to block others from joining you is to have all four players in one session. However, the game doesn't require players to be within a certain distance from each other and it doesn't force them to cooperate. Therefore, unwanted guests shouldn't be a problem.