Beat the computer in Battle mode on any difficulty level.

Accomplish the indicated task to get Gamerscore points:

Big Cheese Of The South Seas: Create a Black Pearl Cluster.
Cluster Buster: Create 25 combos.
Collapse Master: Get a total of 5,000 combos from all games.
Flower Child: Create a Flower.
Grand Pearl Pooh-Bah: Create a Black Pearl Flower.
Hexic Addict: Play 100 games.
Marathon Mogul: Earn 150,000 points in Marathon mode.
Millionaire Extraordinaire: Earn a total of 1,000,000 points from all games.
Oyster-Meister: Create a Black Pearl.
Star Gazer: Create a Cluster of bonus stars.
Survivalist: Successfully complete Survival mode.
Tick-Tock Doc: Earn 75,000 points in Timed mode.

Defuse a single one of your opponent's bombs three times (Battle mode, local or Xbox Live).

Conquer the Expert computer opponent in Battle mode.

Beat Marathon mode by making a cluster, line or flower of Black Pearls.

Complete a game in each game mode (Marathon, Timed, Survival, Battle).

Make a Ruby.

Create a chain reaction explosion of three or more special pieces (any game mode).

Use every type of attack in a single Battle (local or Xbox Live).

Make a Black Pearl.

Make an Emerald and a Star in the same game (any game mode).

Win ten Xbox Live Ranked matches.

Fully charge each attack energy well in a single Battle (local or Xbox Live).