Looks like the servers over at the official War Z site are getting hammered, so who knows if you’ll be able to get from there, but here’s the official link http://arktos-icdn.pandonetworks.com/WarZ_WebSetup.exe
If that dosn’t work or is too slow I have mirrored it here: War Z game client
Note: This is only the downloader, once you download this file and login you will have to download the actual game files.
