I woke up one morning and my half of my games were gone but I got to Google play and it say it's still downloaded on my phone but u can't see the apps how do I fix this
When you've installed an app from Play, the button changes from Install to Installed, and it never changes back. It means "you've installed this app", not "this app is currently installed on your phone". Hitting the Installed button will do the same as it did before, install the app. So if it's not in your app drawer, just install it again. (Of course, you'll most likely lose your previous score and anything you got before.)