Tenchu: Return From Darkness Cheats

Restore health:
Press Start to pause your game, then press Up, Down, Up, Down, X(3).

Every character:
Hold White + Black and press Up, Right, Left, Down at the "Press Start" screen. Release White + Black then press L, R. All multi-player mode characters will be unlocked, as well as Tesshu in story and co-op modes.
User Cheat by FrostedFlakes

All story mode missions:
Press White(2), L, R, Right, X, click Left Analog stick, click Right Analog-stick in the mission selection prompt.

Every layout:
Click Right Analog-stick, click Left Analog-stick, press L, R, White, Black in the mission selection prompt.
User Cheat by JessieJames

Increased offensive power:
Press Start to pause your game, then hold R + White and press Up, Down, Up, Down. Release R + White and press X(3).

All ninja items:
Hold L + R and press Up, Down, Up, Down, X(3), Left, Right, Left, Right, X(3) at the item selection screen.

Increased ninja items amount:
Hold L + R and press Up, Left, Down, Right, X(3) at the item selection screen .

Unlimited item capacity:
Hold L + R + White and press Up(2), Down(2), Left, Right, Left, Right at the item selection screen, then release only White and press X(3).

Through The Portal bonus mission:
Press White, Up, Black, Down, L, R, Left at the title screen to unlock Rikimaru's Through the Portal bonus mission.

New special move:
Press Start to pause your game, then hold R + Black and press Up(2), Down(2). Release R + Black and press X(2), L, R.

Increase Kuji by one:
Press Start to pause your game, then press Left(3), Right, X to increase your Kuji meter by one.

Full Kuji:
Press Start to pause your game, then hold L + R and press Left(3), Right, X.

Display score:
Press Start to pause your game, then press Right(3), Left.

Increase score:
Press Start to pause your game, then press hold White + Black and press Right(3), Left to get 100 more points.

B-side commentary:
Hold L + R and press Down, X(2), Up, X(2), Left, X(2), Right, X(2) at the title screen. Enter the options screen and select "Audio", then "Language". Select the "B-Side" option to hear a third commentary track. REMEMBER: This is only available in the North American and European version of the game. Alternately, get an "Expert" or higher rank for all of Rikmaru and Ayame's missions and a "Professional" rank in all of Tesshu's missions.

Ninja Dog multi-player character:
Get a "Grand Master" rank in all of Ayame's missions.

Semimaru multi-player character:
Get a "Grand Master" rank in all of Rikimaru's missions.

Binding Spell:
Get a "Grand Master" rank in mission 12.

Chameleon Spell:
Get a "Grand Master" rank in mission 3.

Decoy Whistle:
Get a "Grand Master" rank in mission 11.

Dog Bone:
Get a "Grand Master" rank in mission 5.

Exploding Arrows:
Get a "Grand Master" rank in mission 2.

Fire Spell:
Get a "Grand Master" rank in mission 7.

Fireworks:
Get a "Grand Master" rank in mission 10.

Flash Bomb:
Get a "Grand Master" rank in mission 4.

Invisibility Spell:
Get a "Grand Master" rank in mission 6.

Ninja Armor:
Get a "Grand Master" rank in mission 9.

Super Shuriken:
Get a "Grand Master" rank in mission 1.

Viper Potion:
Get a "Grand Master" rank in mission 8.