All Shu generals:
Press White, Black, X, Y, White, R, L, Black at the main menu.
A sound will confirm correct code entry.
All generals:
Hold L + R and press White, Black, Y, X(2), Y at the main menu.
A sound will confirm correct code entry.
Opening Edit option:
Press X, Black, Y, White, L, R, White(2) at the main menu.
A sound will confirm correct code entry.
BGM Test option:
Press L, White, Y, R, White, Black, X, Y at the main menu.
A sound will confirm correct code entry.
In-game reset:
Press Start + Back during game play.
Note: This only works in certain screens.
Alternate costumes:
Press A or X when selecting a character to choose
between two costume colors.
Bonus FMV sequence:
Highlight the "Replay" option at the "Opening Edit" screen,
then hold L + R and press A. You will see all of the people
from the gray army dancing.
Highlight the "Replay" option at the "Opening Edit" screen,
then hold Black + White and press A. You will see Zhu Rong singing.
Very hard difficulty setting:
Successfully complete the last level of Musou mode under the
hard difficulty setting to unlock the "Very Hard" setting at
the option menu.
More powerful arrows:
To make your arrows more powerful, hold R as when firing an arrow,
but press Y. It will shoot a more powerful beam instead of just a
normal arrow. You do not need the stronger arrows item for this trick.
Sites: