Google Play Games 将会有有改动。过往每次玩一款新游戏，游戏若使用了 Google Play Games 服务的，就要回答是否使用 Google 帐户登入。
在新改动下，玩家只需为帐户登入一次，而不用再为每一个戏登入。首次登入之后，往后玩其他游戏时，帐户就会自动登入。另外，用家亦不用再为 Google+ 帐户升级，也可以使用 Google Play Games 服务。
– Players are prompted to sign-in once per account, rather than once per game
– Players no longer need their account upgraded to Google+ to use Play Games services
– Once players have signed-in for the first time, they will no longer need to sign in to any future games; they will be automatically signed in
用家若不想使用自动登入，可以在 Play Games App 内的设定将 “Auto Sign-in” 停用就可以。
Source: Android Developers
