Quoted from donjagra:I would be down with a zombie theme pin. It could have some cool stuff like, brain eating multiball, zombie bite countdown, collect zombie killing weapon modes, and zombie carnage wizard mode.
The artwork would have to be a little toned down though, it would be really easy to go too far with zombie hoards.
Actually the guys at PAPA are building a custom game called "Graveyard" (or something close to that) Out of old Gottlieb Volley machines. The start of the project is in part 5 of the Game Room Classic's 8 part vid on Pinburgh 2011.
The artist mentions how there aren't really any zombie themed games. (spoiler alert) And when PAPA flooded several years ago the machines that could not be played any more have been stored in the warehouse for possible parts, in a place they call "The Graveyard". (covered in "Special When Lit")
Pretty cool.