In Happy Dungeons, you can cooperate with a maximum of four other players as you take on the dungeons.
Online Match Play
Players with Xbox Live Gold membership can connect and play with players from all across the world via the network.
To start matchmaking, you can enter the Lobby via "Search for Games Online." Alternatively, you can also choose "Create Game" to enter the Lobby, and then unlock your privacy settings from there.
Local Multiplayer
Connect multiple controllers to a single Xbox One console, and up to four players can play at one time with a split-screen view.
If there are three players or fewer taking part in the local multiplayer game, you can still search online for additional players.
Players joining local multiplayer will need to connect a controller and press 
at the Home screen, then select an account.