Chomp

After a failed attempt at a zombie apocalypse, you are left as the last of your kind. Now just a zombified head, you must spread the Z-virus by biting as many ankles as you can within your shortened un-life span.
The game puts you in the role of a zombie head who must use its extra strong neck muscles to traverse the world and spread the virus by biting the only human appendage within range, ankles.