Lookout! There's a zombie infestation and you have been infected! So kill all humans!! Well not all the time anyway, there are two modes to this event.. Human and Zombie and of course, two different prizes as well as various levels of each prize so it really does take some participation to get to your goal!
If you are a zombie your home screen banner will look like this..
and you should get this kind of popup when you go to fight.. or "Kill Humans" as it says :P
Once you get to 80 points you might as well stop, you're just wasting stamina after that..
It will also warn you when the round will end soon...
If you are on the Human side your home banner will look like this:
and you will get a popup like this when you fight.. and as you can see you can buy an antidote to cure zombification.. but it doesn't last so I don't reccommend it!
So get out there and just attack the opposite of what you are, it will net you the most points.. and get some sweet loot! There's a whopping 10 days to participate in the event, so from now until Nov 5th you should be able to get a hold of several prizes!
Here's the Q&A from zynga's website about the event:
The Zombie Apocalypse is upon us! Put your fighting skill to the test in a battle for humanity.
Fight as either a Survivor fending off the Zombies or as a Zombie trying to turn Survivors into Zombies. The Zombie Apocalypse Fight Event starts on Wednesday, October 26th, 2011.
Your alliance is assigned at the beginning of each season; each season ends when the Zombie contamination has overwhelmed the game. Your alliance is identified by an icon next to your name and your screen border theme.
Earn Mastery tier items by icing other players - Survivors and Zombies, though scores are greater for icing those on the opposing side. There are many opportunities, depending on your score, to collect loot drop and mastery items for both sides, which are granted at the end of each season. Collect the final item in each Mastery tier to claim the reward and move on to the next; there are four tiers - Bronze, Silver, Gold and Ruby. Master both sides in order to become a stronger fighter.
Q: How is it determined whether I will be a Zombie or a Survivor?
A: Which faction you fight for is determined randomly at the beginning of each season. You will fight the entire season as the faction that you were assigned at the beginning. (Important to note, however, is that you can use the antidote to become Survivor again, or get infected to become a Zombie.)
Q: How long will each season last?
A: Each Zombie Apocalypse wave, or 'season', can last from several minutes to a few hours.
Q: How many seasons are there?
A: There are not a pre-determined number of seasons. Each season will end when the Zombies overwhelm the game.
Q: How do I earn the most points?
A: You will earn more points by icing those on your opposing side.
Q: How many mastery levels are there?
A: For this event there are four levels: Bronze, Silver, Gold, Ruby
Q: What are the number of points that I will need to earn for each mastery level?
A: Each player will begin the season with 0 points. The chart below shows how many points that you will need to for each level. Remember, the seasons vary in length so you should ice your opponents as quickly as possible!
Q: Can I earn mastery for both Zombie and Survivor?
A: You can earn mastery items as either a Zombie or a Survivor for each season, but only one mastery item per season will be awarded.
Q: What if I don't want to be a Zombie?
A: There is will be an antidote available for 7 Reward points that will cure Zombification as well as any new outbreaks for 2 minutes.