Difficulty setting release command
If you enter the Konami command [↑↑↓↓←→←→×○] on the title screen, Raiden's voice will read the title.Then, you will be able to select the highest difficulty level, ``REVENGENCE'', which originally could only be selected after clearing the game.
Benefits of restart
When restarted, LIFE etc. will be fully recovered. If your LIFE has decreased beyond the CHECK POINT, you can also try restarting. There are no disadvantages such as lower ratings.Ultimate sneaking
By repeatedly putting on and taking off the cardboard box, you can gradually make progress. Even if you do this right in front of the enemy, they won't notice.The mechanism is made possible because ``the action of taking off the cardboard doubles as a slight forward motion'' and ``immediately after taking it off, there is a period of time when it is not noticed.''
Various small stories
Inherited elements after clearing
Customized content, unlocked items, BP, and acquired items will be carried over.BP earning
If you earn BP and go to the customization screen, you can return to the CHECK POINT with the same BP. By repeating this, you can efficiently earn BP. An example of a highly efficient location is as follows.Undressing civilians
You can rip off the clothes of civilians you rescue and run away by slashing them.
