First of all, please note that multiplayer mode is only avaible after you have purchased the full version of the game : you cannot join a multiplayer game with the trial version.

To access multiplayer mode, click on the purple ‘Party Up’ button on the main screen or in the menus.

• If you want to join a public game, click on ‘Find Players’, and choose a game. 
• If you want to create a game, you must first select a game mode: story, arcade or survival. Click on ‘Party Up’ and then on ‘Create Party’. Choose whether you want your game to be public (any player can join) or private (you need to give your friends a code to join your game).
• To join a private game, click on ‘Join Party Code’, and enter the code provided by the game host.