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

Spoon Fed Ogre (30 points): Complete the game in Charming Difficulty.
Glorious Liege (80 points): Complete the game in Grimm Difficulty.
Hail to the King! (60 points): Complete all 20 missions of the game for the first time in any difficulty.
Questing Rookie (40 points): Complete 33% of the Challenge Quests in the game.
Questing Fiend (50 points): Complete 66% of the Challenge Quests in the game.
Questing Ogre (80 points): Complete all the Challenge Quests in the game.
For the Fridge (30 points): Collect 33% of Coloring Book Pages in the game. (Any Difficulty)
Upstart Artist (40 points): Collect 66% of Coloring Book Pages in the game. (Any Difficulty)
Art Collector (50 points): Collect 100% of Coloring Book Pages in the game. (Any Difficulty)
The Finisher (50 points): Perform 100 finishing moves.
The Juggler (40 points): Launch 50 Enemies into the air then catch them with Shrek.
Survivor Shrek (60 points): Achieve a Perfect on every level. (Normal difficulty or higher)
Super Ogre (30 points): Use Super Ogre Power 5 times with Shrek or Fiona.
Novice Collector (30 points): Collect 33% of all Souvenir Mugs in the game. (Any Difficulty)
Amateur Collector (40 points): Collect 66% Souvenir Mugs in the game. (Any Difficulty)
Master Collector (50 points): Collect all Souvenir Mugs in the game. (Any Difficulty)
Ice Dragon Tamer (30 points): Defeat the Ice Dragon. (Normal Difficulty or higher).
Music Critic (30 points): Defeat Captain Hook. (Normal Difficulty or higher).
Upstaged Charming (30 points): Defeat Prince Charming. (Normal Difficulty or higher).
The Collector (60 points): Complete all of The Collector series of quests.
Super Ogre Power Extreme (60 points): Use Super Ogre Power 10 times with any character.
Ogre Smash! (30 points): Use Fairy Dust Attack 50 times with any character.