Non-zero-sum games that emphasize cooperation over competition are shaping the digital world. These "coop games" see players as partners rather than opponents, encouraging win-win scenarios through activities like collaborative problem-solving. Three disruptive trends are driving this change: 1) ubiquitous connected devices enabling new forms of social play, 2) games appealing to mainstream all-ages audiences through social and cooperative mechanics, and 3) user-generated content that facilitates mutual entertainment through player interaction and expression. Emerging best practices for coop game design include using large, meaningful challenges to inspire collective action; having players compete against the system rather than each other; and allowing talented players to extend the game world.