Unlock Xbox Live Gamerscore points, by completing the following Achievements.

Achievement	How to unlock
Chain reaction ( 10 points )	Perform 3 series of 5 different attacks.
Chicken-kicker ( 20 points )	Kick 100 chickens in one game session.
Feather factory ( 20 points )	Kill 500 enemies in one game session.
Hail to the Goddess ( 20 points )	Unlock Katsuni.
Invincible ( 20 points )	Complete the game without a single game over.
Liberador ( 10 points )	Complete the game in Normal mode.
Luchador ( 20 points )	Complete the game in Hard mode.
Natural Born Killer ( 20 points )	Kill 10 enemies in a row without being hit.
One against all! ( 20 points )	Complete the game solo.
Saint Luchador ( 10 points )	Save all of your team mates from Backfire.
Strike ( 10 points )	Hit an enemy by throwing another enemy at him.
Teamplayer ( 20 points )	Unlock all multi combos to the max.