What is the maximum completion percentage in gta v story mode?

GTA V story mode features a comprehensive completion system that tracks progress across main missions, side missions, activities, and collectibles. Players can achieve 100% completion by finishing all story-related objectives, completing all side missions for Michael, Franklin, and Trevor, participating in activities like golf, tennis, and flying school, and collecting all hidden packages and spaceship parts. The game's official guide and Rockstar Games' support documentation confirm that fully completing all content unlocks the maximum 100% milestone, which is displayed in the game's statistics menu.