A sickness or a virus called madcow diesease
Probably not because zombies are dead people who are living. It makes no sense.
More plants,such as Weed(makes zombies high*,Bed-uce(a lettuce that makes plants asleep,making them more useful when they wake up),and more. More zombies also and more maps like the sandbox.
it makes you shoot faster
It makes your dick hard and your hair smoother. :-)
Makes your gun stronger, makes your maximum ammo more, can add an underbarrel.
as many as you can survive. there isn't an end of rounds the zombies just keep coming till you die. that's what makes it so fun because it cant be completed.
element 115 is not real element that makes zombies but im petty sure they will discover the element 115 but it woundn't make zombies in real life.
on plants vs zombies it works for some and not for others sadly it doesnt work for me and hopefully it workes for most others but it works for some and doesnt for others!
A scientist found a chemical and turned another scientist, his daughter and their dog to zombies. then the chemical infected other people and made more zombies.
There are no zombies. Zombies are fiction.
It makes your crops worth double their money but I don't know what happens to fertilized zombies
It makes the zombies not be able to hit u so u can't die