If you’ve got an iPhone or an iPad, there are a fair number of apps you can download for free: Pages, Numbers, iMovie, GarageBand and so on.

But did you know there’s a secret cache of Apple apps that no one but Geniuses can download? There is, and they range from a basic flight sim game to a tank battler to an internal newspaper only Apple employees can read!

Opening this week’s must-have games roundup is a stunning first-person shooter that has you protecting planet Earth from invasion from the “Xenos,” who are on a mission to infect every civilian that gets in their way. We also have a crazy dual-stick shooter that has made the leap from Xbox LIVE to your pocket, an update to Angry Birds Space, and lots more.