"This is the Utopia that you guys dreamed of, the world on top of a game board, [Disboard]--everything here is decided by a game, even one's life and country borders!" ― Tet to the siblings.
The Boardtop World, Disboard (盤上の世界,Disubōdo) is the world where the primary storyline of No Game No Life (Series) takes place. This fantasy world was modified by Tet. After he became the "sole victor" of the war between the Old Deus, thus being granted the title of the One True God, he commanded the 16 different races to end all wars and implemented the Ten Pledges.