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

Apple-opolis (30 points): Unlock all the Apple Avatars.
Rotten to the Core (30 points): Be targeted by the "Rotten Apple" card 10 times.
An Apple A Day (30 points): Reach the Orchard Rank in Xbox LIVE by playing 500 games.
Falling Far from the Tree (20 points): Play the "Every Apple for Himself" card 5 times.
Apple of My Eye (10 points): Win your first Xbox LIVE game.
Sour Apple (5 points): Play a Golden Apple Card for the first time.
Mad Apple (10 points): Lose 3 Xbox LIVE games in a row.
All Your Apples Are Belong to Us (10 points): Play the "Apple Tart" card 10 times.
No Apples for You (20 points): Play the "Yes, We Have No Apples" card 10 times.
Apple Seeds (5 points): Complete the Single Player tutorial.
Apple-ocalypse (20 points): Be the second player to play an "Upset the Apple Cart" in a single round.
Social Addict (10 points): Enable Social Integration for posting achievements.