The document discusses four different art styles used in games: photorealism, cel shading, abstraction, and exaggeration. It provides instructions to find three examples for each style that demonstrate how the style sets the tone, theme, and feel of the game. Photorealism aims to make games look as realistic as possible, while cel shading mimics the style of manga/anime. Abstract games have no clear purpose or story. Exaggeration is common in cartoons and makes characters appear unnaturally tall or proportions. The styles help set the mood and target audience for each game.