Fatal Fury Special Cheats

Achievements
Complete each of the following achievements below to get the allotted gamerscore.

10 Straight Wins (35): Achieve 10 straight wins on Xbox Live.
10 Wins (10): Achieve 10 wins on Xbox Live.
5 Straight Wins (20): Achieve 5 straight wins on Xbox Live.
50 Wins (20): Achieve 50 wins on Xbox Live.
Complete the Game (15): Complete the game, in Arcade Game.
Flying Kim Bonus (5): This is a secret mission. You need to unlock it first.
High Score (10): Acquire more than 400,000 points, in Arcade Game.
Mai's Folding Fans (5): This is a secret mission. You need to unlock it first.
Perfect Victory (5): Defeat your opponent without sustaining any damage, in Arcade Game.
Survival (30): Complete the game mode without losing and continues, in Arcade Game.
THE KING OF FIGHTERS (35): Achieve 100 wins on Xbox Live.

Ingame Cheat Menu
In game, hold Start and push A, X and Y together to get to the cheat menu, you can unlock Ryo Sakazaki this way and get all the usual neo geo cheat options like infinite health/credits.