I don't know any zombie game by a guy named ken, but have you tried Leo Fuchigami's zombie game? - I'm not sure if you can find it on here anymore, as he has, sadly, moved on to bigger and better things. I may have it on an old jump drive though.

Alternatively you can also use mine if you like.
www.waygook.org/index.php/topic,49105.msg377397.html#msg377397

Here's another one of my favorites, it's an alien invasion game w/ story,
www.waygook.org/index.php/topic,75591.msg467795.html#msg467795

I also have a game based on the OP alien game where I created a continuing story to the alien game, where students have to role play to survive. If interested I can send you the file.

Is this it dude? If so, I can probably dig up the worksheet.