Apple iPhone 4G - Manual (Page 184)

4 Enter and send your invitation, then wait for the others to accept.
5 Start the game.
If a friend isn’t available or doesn’t respond to your invitation, you can tap Auto-Match
to have Game Center find another player for you, or tap Invite Friend to try inviting
some other friend.
Other players may invite you to play the game.
Respond to an invitation to play a game: Tap Accept or Decline in the alert that appears.
You can disable multiplayer games in Restrictions. See “Restrictions” on page 196.
You can prevent other players from inviting you to play games by turning off Allow
Game Invites in Game Center settings. See “Your Status and Account Information” on
page 186.
Return to Game Center: Press the Home button, then tap Game Center on the
Home screen.
You can also press the Home button twice quickly, then tap Game Center in the list of
recent apps.
Leaderboards
Some games provide one or more leaderboards to show the ranking of the game’s
players, with their scores, times, or other measures of the players’ success.
See a game’s leaderboard: Tap Games, then choose the game and tap Leaderboard.
You may also be able to view leaderboards from within a game.
If a game has variations (such as Easy, Normal, and Hard), the Categories screen lets
you choose the leaderboard for the game in general, or for one of the variations.
The leaderboard shows the ranking of your friends, and of all players. You may be able
to view leaderboard stats for a specific time period, such as today, this week, or all time.
Rotate iPhone to see a leaderboard in landscape orientation.
Start playing a game from the leaderboard: Tap Play in the upper-right corner.
Achievements
Some games reward you with bonus points for specific achievements.
See the possible achievements for a game: Tap Games, choose a game, then tap
Achievements.
For each achievement, Game Center shows how many bonus points are awarded,
and whether you’ve completed the achievement. The total points awarded for your
achievements appear at the top. You can get bonus points for a specific achievement
only once.
You may also be able to view achievements from within a game.
184 Chapter 24 Game Center