Save your game profile by connecting it to Google Play Games. You are supposed to be logged into Google Play Games by default:
Launch Google Play Games;
Make sure you're logged in with an account that has no other WR profiles connected to it;
- Go back to the home screen and restart War Robots;
- Open War Robots and connect it to Google Play Games via the game menu.
The above will work only in case you don't have another War Robots profile connected to this Google Play Games account. If you'd like to save a WR profile but you're logged in with a Google Play Games account that already has another WR profile connected to it, you should bind it to a new Google Play Games account.
NOTE: Connecting your game to Facebook doesn't save your progress.