During the production of a video game, many rough sketches are made. These sketches may vary widely from the final product, but its amazing to view what a game could have been. In this case, its the art of Halo 3, Halo ODST, and Halo Reach being defined by the incredible Isaac Hannaford.
Here is a short gallery showcasing some of the many pieces that can be found on his website.
Click on picture for enlarged details.
Spartans Fight Off The Flood
New Alexandria