GREE is the social platform introduced in Battle Bears Royale, which was used from v1.3.3 to v1.4.2. GREE is a Japanese company and is the leading social mobile gaming network in most of Asia. In

The Gree icon

April 2011, the company purchased the popular social gaming network OpenFeint in a huge $104 million dollar fusion. The purpose being a united social gaming network with benefits for all mobile gamers.
For more information, see News: Battle Bears integrated with GREE - goodbye to OpenFeint