At the start menu press Triangle, Square, Triangle, Circle, Circle, Square and you'll block all the attacks.
At the menu screen hold L2 + R2 and press x, Triangle, Triangle, Square, L1, R1.
The following swords are listed by order of strength. Complete the indicated task to unlock the corresponding sword.
Complete the indicated task to unlock the corresponding character.
When you get to the waterfall where enemies attack you, defeat them all. Then, walk into the waterfall. Behind the waterfall is a secret room with the gold idol.