Board Thread:Game Discussion/@comment-79.245.110.196-20170910113256/@comment-2001:E68:4430:FA45:13E:D850:78FB:C9B6-20170910134239

Looks like the game no longer store your achievement locally, they are now stored online and sync to your device when you go online.

So start your game while online, for the data to sync with your device. Then disconnect your Internet if you want to play offline (bot management etc).