Naruto Shippuden: Ultimate Ninja Storm offers one of the biggest rosters to date for the series. Still you will need to unlock some hidden characters if you want them all. This Naruto Shippuden Ultimate Ninja Storm 4 Character Unlock Guide well help you get them all!
Naruto Shippuden Ultimate Ninja Storm 4 Guide: Character Unlock GuideMost of these are unlocked as you progress through the main story.
Rin – Unlocked after you beat The Boy’s Battlefield Part 1 in the story mode.
Obito (Berserk) – You will unlock this Obito after you beat the mission In Hell.
Hanabi (the Last) – This Hanabi is unlocked after the story mission after Team 7 Reunited.
Obito (Ten Tails Jinchuriki) – Another Obito, this one is unlocked after Filling A Hole Of The Heart.
Guy (Great Ninja War) – A new Guy character and he is unlocked after The Crimson Beast story mission.
Madara (Six Paths) – The next three are unlocked after the story mission Wind Rages, Thunder Races.
Naruto (Sage Of The six Paths Mode) – Unlocks after beating Wind Rages, Thunder Races.
Sasuke (Rinne Sharingan) – Unlocks after beating Wind Rages, Thunder Races.
Kakashi (Double Sharingan) – This Kakashi is unlocked after the story mission Kaguya, The Violent Goddess.
Kaguya – Unlocked when Kakashi (Double Sharingan) is unlocked after the story mission Kaguya, the Violent Goddess.
Naruto (The Last For All) – These last ones are all after you beat the game. It is a cut scene and you will unlock Naruto, Hinata and Sasuke in their adult forms.
Hinata (The Last For All) – Unlocked after the Story Mission, Buds.
Sasuke (The Last For All) – Unlocked after the Story Mission, Buds.
There still seems to be other slots that have characters in them, I am progressing through adventure mode at the moment so more characters may be there. Check back soon for updates!