Tenchu 2: Birth of the Stealth Assassins Cheats

Performing Stealth kills while your weapons are sheathed (Rikimaru & Ayame)
When you hit the Square button near the enemy, the stealth kill animation will begin regardless of whether your weapon is sheathed or not. This bug can be used in your advantage since Rikimaru and Ayame move slower than normal will their weapons sheathed.

This WON'T work if you try to do it on a ground that isn't perfectly flat or a place where there isn't enough space like to perform the Stealth kill animation.