Default [Q] Any way to BLOCK google+ register and completely block google play games?

I DON'T want a google+ account or to use google play games, but everytime I open some games (for example FFFFF2P or others) they pop up the google play games spam (which firsts spam you about making a google+ account and then about logging in a google play games account). That appears every single time I open the game..

I completely frozen google play games but yet the damn pop-up opens when some game calls for it.

Any way to stop this?

Thanks in advance.