CheatCodes.com has all the official Tenchu Shinobi Gaisen PSX cheats to unlock everything. If you know of any that we don't have, please let us know.
All published and official codes as of Friday May 24, 2013 for Tenchu Shinobi Gaisen are shown below.
Pause the game when having less than full power. Then, press L1, R1, Right, Down, Left, Up.
At the item selection screen, hold Triangle and press L1, R1, Up, Down, Right, Left.
At the item selection screen, hold Triangle and press L1, R1, Up, Right, Down, Left to carry up to 30 items.
Pause the game, then hold L1 + R2 and press Up, Triangle, Down, X, Left, Square, Right, Circle. Resume the game and press L2 + R2 to display the debug menu at any time.
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