All Working Ninja Assault Cheats - Playstation 2

Mission mode Chapter 2
Successfully complete Guren's Chapter in story mode.

Mission mode Chapter 3
Successfully complete Gunjo's Chapter in story mode.

Mission mode Chapter 5
Successfully complete story mode.

Fireworks training mode
Get the top score in story mode to unlock the Fireworks mini-game in training mode.

Shotgun
Get an "S" rank in all the bonus training missions to unlock a shotgun in story mode:

More credits
You can gain one additional credit, up to a maximum of twelve, if you lose all your credits in a chapter.

If you get to the very last Boss of the game on any chapter except arcade, but get "Game Over" while fighting it, you should get a screen that tells you that the number of credits you have has now increased by ten.

Easy reload
This trick requires a controller with an auto-fire feature and the Guncom2. Set up the Guncom2 as usual, then take the auto-fire controller and use it in port one. Set reload to auto-fire. The controller reloads as you do all the hard work.

Accuracy saves health
If you try to empty out your bullets into the enemy's head as fast as possible, this can make you lose more health. Try to limit the speed of your trigger finger . The more bullets you shoot, the more times you have to reload and become vulnerable to being attacked.