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

Knight (5 points): Reach wave 3 Evolved game - Normal difficulty.
Baron (10 points): Reach level 2 Classic game - Normal difficulty.
Viscount (10 points): Score 10000 team points 2-Player Classic game - Normal difficulty.
Earl (10 points): Win a round 4-Player Classic game - Normal difficulty.
Maniac (15 points): Reach level 2 Classic game - Throttle Monkey mode.
Marquess (10 points): Reach wave 5 Local 2-Player Evolved Game - Normal difficulty.
Duke (10 points): Have 4 balls of your colour in play Evolved game - Normal difficulty.
Prince (20 points): Win a wave without exposing your king Evolved game - Xbox Live ranked match.
Elector (20 points): Defeat all 3 opponents Evolved game - Ranked Multiplayer match.
Archduke (25 points): Score 50000 points Classic game - Normal difficulty.
King (30 points): Score 500000 points Evolved game - Normal difficulty.
Emperor (30 points): Win a wave without losing any of your wall Evolved game - Normal difficulty.