A list of friends that can be invited to install a Facebook game.
/{user-id}/invitable_friends in Graph API
Since Graph API v2.0, /me/friends
returns a person's friends who also use the app. You may use the Requests Dialog to invite people to play a game. However, if you want to build a custom multi-friend selector within your game, you need to use call /me/invitable_friends
which returns a ranked list of a person's friends who do not play the game, along with a token which can be passed to the Request Dialog in order to invite them.