From GameWatcher: “Children of Morta is an action RPG that places a significant emphasis on its local 2-player COOP multiplayer. For this reason, players are curious whether developers are aiming to introduce online COOP for more than 2 players.
It just so happens that Dead Mage, the talent behind Children of Morta, has already explained what’s up with online multiplayer, how many players will be able to join, and how it’s all going to mesh together.”
Source: N4G PC Children of Morta COOP – Is It Supported?