„Demonslayer: The Siege of Mt. Kunlun” is what is called a ’deck-building game,’ for up to four players. The game is based on the story „Warriors of Magic Mountain.” Each player takes control of one Sect of the Kunlun Immortals, and they must compete with each other in defeating the dread forces of the Heart-Eaters. By defeating the Heart-Eaters, each player accumulates Cultivation. At the end of the game, once all the Heart-Eaters are defeated, the player with the most Cultivation is the winner.