Dynasty Warriors 4: Empires Cheats
Enter code at the main menu
Code: Press R1, R2, L1, L2, Square(2), Triangle(2)
Enter code while playing the game to return to the main menu
Code: Hold Start + Select
Unlock Yukimura Sanada from Samurai Warriors
To unlock Yukimura Sanada from Samurai Warriors, beat Empire Mode-Historical with every territory and the next time you look at the characters there will be Yukimura Sanada (or will replace Huang Gai in the Wu territory in Historical).
Have a saved game from Dynasty Warriors 4 or Dynasty Warriors 4: Xtreme Legends on your memory card to automatically unlocked pictures 1 through 126 in the gallery.
To unlock the original character artwork in the archives section, complete Empire mode with certain characters in your employ. Save the game history after the credits, and the art can now be seen.
Get an easy win
When you have to defend your base, you do not have to win that level by taking the enemy's base. You can just wait until the time runs out to win.
Ending Edit fourth scene in first and last frames
Finish the 100 turns allowed in any one campaign, but do not actually conquer China. There must be at least one area not under your control at the end of the 100th turn.