@secretfire said in Input on a new mush idea:
Personally, I'd just make a "north America" grid, make it big but not detailed (focus on highways, a city could just be a single room or two), and then just specify what state the main convoy was in right now.
If you had a few people who like to build like crazy, it'd be rather fun to drop new parts of the grid in front of the PCs as they travel along, and leave their ruins behind. The players declare that they're gonna travel along Interstate 23, heading west, they hang about on the highway grid and RP getting attacked by zombie dogs while having to move cars out of the way of their caravan, you drop Deadsville, TN, in front of them and GM their entry into the town a few days later. After the terrible battle that ensues when Bob the PC rips a zombie-attracting fart, and the PCs get separated fleeing the area, you put a 'HORDE HERE' there. Which maybe somebody will clear out, or maybe you remove it at random eventually.
What fires the imagination about 'The Walking Dead' is imagining ways to solve the problem, which is why everybody likes to criticize how those dumb characters handle stuff. I think you'd really want it to be open-world -- not 'you are trapped in the city with zombies MUSH' but 'Zombies! What are ya gonna do about it?! MUSH.' 'Cause just trying to hold your city territory would get boring, but 'Well, living in this walled subdivision didn't work out, let's build a giant tree-house chicken farm!' type shit would be pretty great.