Alternate selection screen:
Press Start at the Konami logo before the introduction to the game in order to get a
different picture at the selection screen. Instead of a pictures of the Ninja, it will
feature the Ninja with his mask broken open.

Submission:
LuCiUsPiG and Al Amaloo

Mei
Ling photo session:
Complete sneaking mode with the best time in all thirty time attack
levels. An option that allows a photo session with Mei Ling will be
unlocked on the "Extras" menu.