Reply: Zombicide:: Rules:: Re: So... I'm playing (surviving) Mission C4... On the first floor I have Ned, Phil, and Doug armed, gearin up, and holdin it down after a run in with an a Abomination. Upstairs on the second floor, Amy and Josh have cleared the open rooms, axed some door

by Loophole Master

I'd say to strictly follow the rules. Only spawn manhole zombies on tiles where there are survivors. So if all the survivors were on the 2nd floor, I wouldn't spawn any zombies on the manholes.