Local Multiplayer
Play with your friends in the updated demo using the new multiplayer feature. Simply click the plus icon where is says "add player" in the top left corner of the main screen. You can play up to 4 players, all on the same computer.
Play with friends around the world using Remote Play
The game supports Steam Remote Play which makes it possible to play up to 4 player multiplayer online, even if you are not in the same room. Invite your friends using Remote Play and you can still play against each other online.