Vault Code
The code to unlock the vault is 1940 which is the year that Catwoman first appeared in the comics. This will unlock new galleries as well as a new comic book cover.
Level 1: Dodging bullets
While on the level 1, there will be a hail of bullets. To dodge them, hold L1 and run around. The chances of you getting hit will be decreased.
Kitty dance
Allow the game to idle and Catwoman will do a dance.
Midnight the cat
When Catwoman comes across this little feline she is in luck. Finding Midnight gives Catwoman nine lives.
Finding Cat Eyes
If you have problems finding Cat Eyes, press Triangle to use your cat vision. Some of them are hidden behind posters and other objects.
Cat Sense
Hold L2 to access Hunting mode. To go to Cat Sense, concentrate on a glowing icon to make it darker, and it will automatically change into Cat Sense. Stop however, and it will turn back to Hunting mode.