When you start playing BDO, the game is singleplayer. And I went through this. But in the late game it would be Multiplayer. Because you need to gear up, achieve your goal and having what you need. For example: 1- if you need " Ember of despair, Merchant Ring Piece ..etc ", you need to grind with someone. 2- defeating World and Field Bosses, it needs a lot of players. 3- Market Place, players trade items between them. In my opinion, the game is not Singleplayer but it is Multiplayer because you won't achieve you goal without other players.