Is Urban Dead, the only one that is free?

There's also Dead Frontier and Die2Nite, which is awesome if you have a good group of players.

Thanks. It is too bad there isn't more free Zombie Apocalypse MMORPGs out there.

Yeah, I'd keep an eye on DayZ and The War Z (which is like War Inc's version of DayZ) in the future, especially as DayZ transitions to a standalone title, but I wouldn't consider them MMOs, per say.

I've been waiting quite literally ages for Zday, also. I'm pretty sure I first heard about it in 2004 or 2005 and the last update was in like 2010. I check it every year or so, but it's going nowhere fast.

Another good browser-based game is Zombie Pandemic.