Longevity

The year is 2159 and a famous scientist has developed a fountain of youth serum.  With the thought of living forever, the public demanded that this serum be made available to all.  Fast forward to 4 years later and ominous side effects of the serum are starting to show.  Those who were given the serum are turning into zombies.  The zombies are wreaking havoc and are now feeding on the living.  To save yourself you need to find the serum, destroy it and get to the community of the living before you are zombie food.