@Beny this is a multiplayer game that can be played in single player. PvP can happen in this game should you and your friends decide to compete againts each other.
Things get very competitive in Driftwood where story driven kill quests for your companions start to intertwine (see Sebile and Ifan,the guy who gets to start the fight with Roost gets to have his quest progressed further).
'Competitive Questing' is hardly a positive feature of this game. It's a bizarre design tumor thats far more likely to cause a breakup of that campaign's group than anything even remotely positive.
And I would wager that this game is played as a single player game far, FAR more often than as a multiplayer game. Portraying it as primarily multiplayer is disingenuous in the extreme.