This lesson is not for the squeamish. I used it to talk about opinions, practice using the second conditional, and to discuss realistic survival skills in an unrealistic situation. Also, I'm obsessed with zombies. I've included a quiz I (slightly) adapted from an online zombie survival quiz I found on www.nerdtests.com. There's another great, more detailed, quiz that has a lot of second conditional, here.
I also got some inspiration from www.designerlessons.org, which has a lot of creative lessons for the ESL classroom. Here's their zombie lesson.