A game engine is a software framework designed to facilitate the development of video games. It provides essential tools and features, such as graphics rendering, physics simulation, and sound management, allowing developers to create interactive experiences more efficiently. Popular game engines include Unity and Unreal Engine, which support both 2D and 3D game development. Game engines often come with built-in libraries and assets, enabling developers to focus on gameplay and design rather than starting from scratch. They also support various platforms, making it easier to deploy games on consoles, PCs, and mobile devices.