I did recently create a tiny riddle in the WC forums and most of them had hard problems to figure it out. If any of you figure the riddle out before the WC community, I would be very afraid about how little knowledge the current WC community do possess.
I'm afraid to say that concussion would not be the main strategy to deal with zombies. I think the same strategies as last year will be used and I do especially refer to 1 unit that was very popular back then to slaughter zombies which will not named. However, you need to open a red envelope before anything else.
You can also use WC Wiki as it can be very helpful.
Video games don't cause violence, lag does.