I had friends over and we tried to play duck game. I created the game and invited them from inside duck game. I tried lan and friends only game modes. When they clicked the join link it put them in their own games. I also had them try to join from the steam friends list. They also couldn't see my game when looking for a game to join. Then my brother and I flawlessly connected using the same method that had earlier failed. With my brother and I connected I tried again to connect a second computer from in my house and the connection timed out.