The first version was too easy. no more advanced tech. Now you have to be creative with your army of zombies. For example: [i]All of my zombies jump off of a building and land on the barricade!
I create a super genetically modified race of zombies that fly (;3) and they bomb the barricade with infectious bile that can spread through the air in tiny molecules...
I make a zombie called the boomer.It sneeks up on you and barfs on you.Every zombie type comes after you.I send it at the barricade. It can also claw the barricade but its not that strong.
My army of Genetically modified zombies evolve and their wings turn into tentacles.Then the zombies climb over the barricade and using their tentacles take all the explosives from the base and put it on the barricade......