To collaborate effectively on a team project, everyone needs to be on the same page. They must share a common vision for the project, understand their individual roles and responsibilities, and know how to access and store the project files. A game design document (GDD) helps align all collaborators by detailing key aspects of the game like gameplay mechanics, narrative, art style, and technical requirements. A well-written GDD introduces the core concept, summarizes gameplay and progression, and outlines sections for art, sound, and game-specific details to teach readers how the game works.