I have setup some achievements in a couple of my games on Google Play. They work just fine but when the player completes an achievement, google services won't notify the player in game to let them know. It will show the achievement completed on the achievement board but it just doesn't notify them when it is actually completed. I know Steam automatically does this, it will have a popup at bottom of screen showing when an achievement is completed. So is this something I need to do myself? For example, create a popup window for each achievement to notify player when it is completed. I tried that and problem I had was even if an achievement is completed it will still show the popup. What can I use to say hey, if the achievement is completed don't show the popup anymore since it was already done. Ideas? Thanks!