6. Sharing (Immediate Sharing from Game )
› Facebook
› Twitter
› Messages
* Required 6
7. Sending challenges for Friends with
Message
generated by Code to encourage
player to do that.
Handle Challenge receive
Handle challenge completion
Can override behavior
* Required 7
8. Game Groups
› Lite
› Full
› Desktop (Mountain Lion)
* Required 8
9. Authentication & delegation
GKLocalPlayer
GKScore
GKAchievement
No Need to submit when failure (> ios 4)
* Required 9