“The Steam platform gives us the ability to reach a huge audience of PC gamers and working with their team has been great,” said Sergey Titov, executive producer for The War Z. “Now that we’ve reached the Foundation Release milestone we will continue to work, as promised, to add features and content that will satisfy our community and keep them playing.”
Players can visit http://www.thewarz.com for more information.
Now, here's the rub. Over at the gaming Reddit, a user named xlephon says, "WarZ releases on Steam: Devs blatantly lie about included features, and neglect to mention game isn't complete. If this isn't false advertising I don't know what is." They also break down the problems with the features here.
So just know what you're getting into!