Zombie Tentacle Demons would be worse; think about it, Zombies have no nerves and infinite stamina and patience. They keep going forever.
Ok, I really didn't need that image.
Would it win from Sofy?
BAD PICTURES! No more mention of tentacles in this thread. Although I suppose that we might want to prepare for undead monsters . . .
I'd probably tend towards explosives, fire, or point blank automatic fire.
Well, after a bit of L4D2, we have more problems. The variable classes of zombie, or super-zombie.
How can we handle those along with the rest of the regulars, without wasting ammo or resources? I mean, we can always send Sof after the smokies, she'll know how to handle them just fine. It would serve as a distraction. As for the remainder, we need more large-scale methods of wiping out hordes that won't require wasting thousands of bullets-per-hundred zombies.
We need some zero-point energy manipulation devices (anti-grav guns), and some nifty traps made using them. We can come up with some construction ideas in GMOD and DF. So far, an idea I came up with involves a cargo container, a gear mechanism of sorts, and a way to automatically power the system to lift it, and drop it every few moments. I suppose a series of waterwheels and a pulley system would work well. Provided it's protected well enough from zombies breaking the cords.