OpenFeint is a third-party library that enables social gaming features such as public leaderboards and achievements. For more information, see http://www.openfeint.com/.
It is very simple to implement leaderboards and achievements once you are ready to network your mobile game to the public.
You will need to create a user account on the OpenFeint Developer site at: http://www.openfeint.com/developers to integrate its features in your application.
Game network allows access to third-party libraries such as OpenFeint, Papaya, and Game Center which enable social gaming features such as public leaderboards and achievements. The API will be able to access those libraries once you implement them in your application. We'll be focusing on the easy-to-use OpenFeint library, which will implement the following features from the game network API.
The following line makes the game network features available under the OpenFeint namespace:
local gameNetwork = require...