Sonic.exe looks exactly like the original Sonic the Hedgehog. The only two known differences are his teeth and eyes (most notably his eyes); his teeth are yellowish and extremely sharp with fangs, and his eyes are pitch black with red, glowing pupils. His eyes also bleed most of the time. In the "I AM GOD." screen, a very gruesome "hyper-realistic" closeup of Sonic.exe's face, there's blood and bits of flesh around his mouth, although strangely, no blood was dripping was from his eyes at all in the image.
 
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