GDD, or Game Design Document, is a crucial document that outlines the game development process starting from the game's objectives to its design and mechanics. Some of the synonyms for GDD include: game blueprint, game proposal, game plan, game outline, game concept, game synopsis, game strategy document, game development plan, or game pitch. These synonyms are used by game studios, designers, and developers to articulate their vision and objectives for the game to potential stakeholders such as publishers, investors, or development teams. A GDD ensures that everyone involved in the game creation process is aligned with the game's objectives and the targeted audience.