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

Top Shot (15 points): In SkeeBoulder, land your Boulder in the maximum multiplier.
Eagle Eye (15 points): Score a direct hit on an enemy boulder with the Castlepult.
Rock the Boat (15 points): Destroy a flying ship.
Berserker (15 points): Hit the castle gate with the fireball powerup.
Prosperous (15 points): Earn more than 7000 gold in one match.
Escape from Hades (15 points): Complete the tutorial level and escape from the underworld.
Flawless Victory (15 points): Win a match with your gate unscathed.
Cocky (15 points): Win a match without destroying any of your adversary's units.
Keymaster (15 points): Find all the keys scattered throughout the levels.
Champion of Champions (25 points): Beat the game in Story mode.
Bling Bling (20 points): Get a gold medal on all maps in Time Trial mode.
Troublemaker (20 points): Win 10 online War games.