Video game mechanics are the rules and systems that govern how a game operates. They define how players interact with the game world, including actions like jumping, shooting, or solving puzzles. These mechanics create the framework for gameplay, influencing player experience and strategy. Common mechanics include leveling up, where characters gain experience and improve skills, and inventory management, which allows players to collect and use items. Other examples are turn-based combat, where players take turns making moves, and open-world exploration, enabling players to roam freely in a vast environment.