Wow wow WOW that's cool, Liz!

And then there's the significance of the letters being thrown at zombies, and this
working as a tactic. I haven't the foggiest what that could mean, though.

I'll have to dwell on that for awhile...
Could mean you have the ability to change an old way of thinking or approaching something (the zombies), by just applying a bit of logic (the letters)? ..Something along those lines. It's hard to say, since it's your dream and not mine. What do you think?
I had an interesting dream last night, one part was definitely videogame-inspired. I had left my family for some reason, and so the part I first remember was me being disappointed about something that had to do with my family.
I drove down towards Washington D.C., but stopped somewhere north of there (heck, I could have been in Bethesda!) and got out of my car. I rented a room, but immediately started walking away from the hotel. Eventually I got on some sort of invisible train with a bunch of others. The train seemed to be made of glass; even if I looked down towards my feet, I could see the tracks
whizzing below at high speed! They were neon-colored tracks, too.
The train (or actually it was probably more of a subway) stopped in its station, and I get out. I went walking through some city-like streets. At one point, I was in a store, and I noticed a gang of youths were kinda moseying towards me. I was attacked by a group of teens in real-life just a few years ago, so anytime I see a pack of kids (especially thuggish-looking kids) I tend to put my guard up.
This is where it gets videogamish. These teens
do start to run towards me. Using my quick-action videogame strategy (lol) and reflexes, I manage to
run towards a staircase but then faked the kids out, by hiding behind some sort of wall. The teens split up, half of them went down the staircase, the other half went in another direction. I RUN out the front door of the mall, and kept running and running!

I was running up a hill. I did not turn to look but I could
swear some of the teen thugs had figured out what I did, and were now after me!
In the dream, I think I don't have very much stamina (as a smoker), so they'll eventually catch up to me. But I woke up then, anyways.
Phew!