Naruto: Uzumaki Chronicles 2 - PS2

Unlockable Missions and Story:

S Rank Missions - Complete the game once.

Kakashi Gaiden (Story) - Complete all missions (including S Rank Missions)

Unlockable Characters in "Two Player Vs." mode:

Sasuke - Complete "Story" mode two times.

Hoshigake Kisame - Complete Kakashi Gaiden story.

Uchiha Itachi - Complete Kakashi Gaiden story.

Restore Chakra:

During loading screens that have an icon of Konoha in the lower right-hand corner, rotate the right analog stick until a blue Chakra ball appears. Doing so will refill a small amount of your character's Chakra.