This document discusses different graphical styles used in games including photorealistic, cel shaded, exaggerated, and abstract styles. It provides examples of games that use each style such as Call of Duty and Battlefield for photorealistic, Zelda and Dragon Ball Z for cel shaded, Final Fantasy for exaggerated, and Geometry Wars and Tetris for abstract. The document also covers how colour theory relates to graphical styles and which game genres tend to use each style, such as war games for photorealistic and RPGs for cel shaded.