why are the games i have downloaded onto my RCA tablet not showing up in my google play games app

[Android Central Question]

when I opened the Google play games app there are three games built in and no more I have apps like minecraft sao memory defrag roblox and growtopia but none of them show up in Google play games

 

[B. Diddy]

Welcome to Android Central! Are all of those games installed from Google Play? Games installed from other sources (like Amazon) won't show up in your Google Play Games.