Hiding articles - sort of

We are going to do a Beta test of a product. We want to link to articles in our help center, but don't want those showing up in a list or category, however. we DO want the direct link the the article show up. 

For example:
Let's say we have an iOS app for our product and we need to Beta test it. We have links in the iOS app that lead to how to use the app, but since the app is not available for use yet, we want to hide the articles, but have those testing to be able to see the articles (without having a Zendesk account). 

Is this possible?