You need to be playing in the same region (by having the same download region on steam) then one of you should host the game and the other just has to refresh the list and you should be able to see the available sessions!
this doesnt work for me idk how to join could you like sent a video on how to do it
I updated the description with a text tutorial. See if it helps ;D
indeed the multiplayer was not working in patch 1.1 and 1.2. But now it is :D
