Why can't I download an app that I've previously deleted?

On the App Store I wanted to download a game that I've previously deleted but it doesn't give me the option to download it to my iPhone? What do I do?

If it's an older iPhone, then they've probably just stopped allowing you to download most apps, apple do this.

Go to the App Store then go to updates icon the fourth from the bottom, then you have the option to update any apps that you can or go to the purchased icon it will being up a list of your apps go to, not on this iPhone and then It will bring a list of all your apps you have downloaded that are not on your iPhone at the time go to the app you want to download and hit the cloud button by the app it will then re-download this should work for you