Accomplish the indicated achievement to get the corresponding number of Gamerscore points:

Play 5 (5 points): Play online for 5 games.
AI? Yeah, Right! (20 points): Beat the AI at all four games.
Game Swap (5 points): Playing online, play at least one game of all four game types in the same session.
Chess Champ (25 points): Play online and win 10 Chess games.
Five Kings (10 points): Play Checkers and in any game get five Kings.
Mancala Master (20 points): Win a game of Mancala with 27 pieces or more.
King Me! (10 points): Get a king in Checkers.
Mancala Warrior (20 points): Play online with a friend and win 2 Mancala games as white and 2 as black.
Four Corners (30 points): Capture all four corners in any game of Reversi.
Winner Of Games (30 points): Win a ranked match in all four game types.
Overkill (20 points): Win at Chess while taking every one of your opponent's pieces except for the King.
Player of Games (5 points): Play all four game types at least once each.