Photorealism uses cameras and photographs to create highly detailed paintings and games that appear photographic. Cell shading renders 3D models to look hand drawn like cartoons. Abstraction uses simple shapes and lacks detail, as seen in games like Tetris and Pac-Man. Exaggeration is used in anime and manga games to create over-the-top, farfetched styles like in the Naruto and Dragon Ball series.

1. ArtisticStyles
Photorealism –
Photorealism is the genre of painting based on
using cameras and photographs to gather visual information
and then from this creating a painting that appears to be photographic.
Photorealism is the art style of trying to convey, characters, objects and scenes, to
look as real as possible. By taking pictures of real objects and texturing them how the real
object looks. Many arguments are raised between developers to whether photorealism is really
needed to advance the games industry. It is mainly used in first person shooters to show detail. Games that
use photorealism usually take longer to create as every object is made up of polygons and pixels, yet
photorealism takes up more disk space, that’s why some games
come on two discs or even three.
Cell Shading –
Cell shading is a type of rendering which makes 3D models look hand
drawn. It is mainly used to mimic cartoons or comics. Games that use
cell shading can be Borderlands, Catherine and Dragon Ball. It is
somewhat recent, appearing from around the twenty first century.
In addition to computer graphics, it most commonly turns up in
video games however; the result of cell shading has a very
simplistic feel like that of hand drawn animation. The name comes
from Celluloid the clear sheets of acetate which are painted on for use in
traditional 2D animation, such as Disney classics.

2. Abstraction –
The art style of, less is more, this is where the art style of the game really doesn’t mean consent to anything is
just there. An example of this can be Tetris and arguably Pac man, game that are
made up of simply shapes. Artwork that reshapes the natural
world for expressive purposes is called abstract; that which
derives from, but does not imitate as a recognizable subject is
called non-objective abstraction.
Exaggeration –
Exaggeration is the art style used in many anime or manga games. It is designed to be over the top, it is
designed to give the game a more farfetched fun factor. There images are expressed more highly than normal
games. The naruto game series and dragon ball game series are great
examples of this.

3. http://www.slideshare.net/AkiTenshi/artistic-styles-in-computer-games
http://en.wikipedia.org/wiki/Photorealism
http://animepicture-s.blogspot.co.uk/2011/06/great-fighting-in-new-online-naruto.html