Complete the following achievements to unlock Xbox Live Gamerscore points.

Necklace Of Cannon (10 points): Complete Chapter 4 in Story mode.
Promise With The Cannon (10 points): Complete Chapter 2 in Story mode.
Proof Of Friendship (10 points): Complete Chapter 3 in Story mode.
Silver Medal (30 points): Get 100 wins.
Toradeishiyona (30 points): Get 500 total wins and losses.
Chikara Is Lost (10 points): Complete Chapter 1 in Story mode. 

Additionally, there are fourteen secret achievements.