How do I change my Gamertag in games? I need some help or clarification on if I can change my Gamertag in the few games that I play on my Android Device.  For example, my First Name last Initial shows up along with my Picture in all the games when I log in.  However, I would like it to show the picture but have a gamertag or use a different name other then my own.

Real Racing 3 is a prime example.  There are a ton of users using Gamertags/Avatars, however, you can only login using Facebook, some chinese website and Google +.  There is no where in there to change your name.  I have looked everywhere.  

Also if you look at your trophies I would like it to show my NEW USERNAME.
Does anyone have an answer or suggestion?

Can I create a second Google+ account and not lose all the points I have acquired?  I have searched everywhere for months actually as the answers to most questions are usually found with a simple search.
If you want to change your name for Google Play Games and it's related leaderboards you will have to change your Google+ name. There is no way to transfer your Google Play history and points to a different Google account.