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

Diamond necklace (15 points): Get 5 diamond helmets in campaign mode.
The Hero's Debut (5 points): Complete 5 levels in campaign mode.
Aspiring Hero (5 points): Unlock access to World 3 in campaign mode.
Simply Rotastic (5 points): Do the Rotastic trick.
This is No Lifestic! (50 points): Get all gold helmets in campaign mode.
The Jeweler (10 points): Collect 5,000 jewels.
The Butcher (20 points): Kill 10 enemies in a row without losing a life during a multiplayer game.
The Socialite (15 points): Play 20 multiplayer games.
Mini copper (30 points): Get all copper helmets in campaign mode.
Hero on the Rise (10 points): Unlock access to World 5 in campaign mode.
A New King is Crowned (25 points): Unlock access to World 7 in campaign mode.
The Ninja (10 points): Kill 3 enemies in 4 seconds in a multiplayer game.