The Roundnet / Spikeball set can be played with 2 teams of 2 people each.

Everyone stands evenly distributed around the net. To serve, the ball is hit onto the net with the flat of the hand so that it flies into the opponent's side. The opposing team can now pass the ball to each other up to three times before it has to be hit into the net again. The aim is for the ball hit in this way not to be reached by the opposing team. After the serve, each player is allowed to move freely around the net. This is what makes the game so fast-paced.