Alternate Costume: 
Finish a character's musou mode to unlock their alternate costume, select by pressing triangle (Japanese Version).

Easy AI in Hell difficulty
This glitch is the same one from Dynasty Warrior 4: Xtreme Legends. It lowers the enemies' AI so that it attacks and blocks a lot less frequently. However, the strength, HP and defense remain at original values. 

1. Create game in normal, hard or hell difficulty. 
2. Save after the game begins. 
3. Change difficulty to easy. 
4. Restart saved game and note the change in the AI. 

Fight Lu Bu:
You can face Lu Bu from the Dynasty Warriors series by reaching the 30th floor in the Abyss level of Survivor mode.

Easy Last Weapons (JP Version Only)
In 1P, you will need to fulfill a character's unique requirements in order to get his/her last (5th) weapon. But using 2 players, you can use a character with an easier requirement to get another character's last weapon. For example, Sanada Yukimura's requirements are really tough. You can get his last weapon in any other character's story using 2 players. This is obviously not intended by the game because you are getting the ''wrong'' 5th weapon. 

1. Choose Free Mode. Hard or hell difficulty. 
2. Choose the character you want the 5th weapon for as 1P. 
3. Choose the character you're most comfortable with as 2P. 
4. Choose the stage in which 2P can get his/her 5th weapon. 
5. Fulfill 2P's requirements to get his/her 5th weapon. 
6. When supply team appears, let 1P take the weapon dropped by its captain. 
7. Finish the stage, and you'll find that you got 1P's 5th weapon instead of 2P's.


Unlock New Characters:
Unlock new officers by doing the following: 

Magoichi ...Clear any campaign 
Masamune ... Clear any two campaigns 
Shingen ... Clear Sanada's campaign 
Kunoichi ... Clear Hanzo Hattori's and Shingen's stories 
Keichi Maeda ... Clear Kenshin Uesugi's story 
Okuni ... Clear Keiji Maeda's story 
Goemon ... Clear Okuni's story 
Ranmaru Mori ... Clear Mitsuhide Akechi's story 
Noh ... Clear Ranmaru Mori's story 
Nobunaga Oda ... Clear Oichi's, Magoichi's, and Noh's stories.

Unlock Second Costume:
Finish an officer's Story Mode campaign to unlock their second costume. This can be either the "good" ending or the "bad" ending. Press CIRCLE while selecting your officer for a session to toggle the second costume.

Versus mode:
At the title screen, hold L1 + R2 then press Right + Square to unlock versus mode. 

All sword skills:
Pause the game in versus mode, then hold R1 and press Left(2), Right(2), L1(2), L2(2), L1, Right, Left. 

Increase sword hardness:
Pause the game, then hold R1 + R2 and press Right(7), Left, Down, Up, Square. The main player's currently equipped sword will increase in hardness by one. Repeat as needed to reach the maximum hardness of five. Note: This cannot be done in versus mode. 

Change characters:
Highlight the name entry prompt for the main player at the character selection screen, then press L1, R1, L2, R2, L2, R1, L1, Left(4), R2 + Square. Press Left or Right to choose a character.