For what reason should a game be optimized?

to expand its compatibility allowing access to more players
to offer realistic graphics
to run code
to choose the best lighting for each scene

All of the above reasons are valid for optimizing a game, but let's break them down further:

1. Expand compatibility: By optimizing a game, developers can ensure that it runs smoothly on a wider range of devices and platforms. This allows for a larger player base, as players with lower-end hardware or different operating systems can also have access to the game.

2. Realistic graphics: Optimization plays a crucial role in achieving realistic and visually appealing graphics in games. By optimizing the rendering pipeline, reducing unnecessary calculations, and utilizing efficient rendering techniques, developers can maintain a high level of graphical fidelity while ensuring the game runs smoothly.

3. Run code: Game optimization also focuses on improving the performance of the game's underlying code. By optimizing code execution, memory usage, and processing algorithms, developers can achieve better frame rates, faster loading times, and overall smoother gameplay.

4. Lighting optimization: Optimization also extends to lighting in a game. By choosing the most suitable lighting techniques for each scene, game developers can enhance the visual quality and ambiance, making the game more immersive and realistic.

In summary, optimization is important for expanding accessibility, improving performance, achieving realistic graphics, and creating a more enjoyable gaming experience.