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 L and run around. The chances of you getting hit will be decreased. To dodge the bullets you need to roll. To do this, hold L while running around then
press R to roll. You can also roll to break some objects.
Midnight the cat
When Catwoman comes across this little feline she is in luck. Finding Midnight gives Catwoman nine lives. Hold Z and look around for its paw prints to help find it.
Kitty dance
Allow the game to idle and Catwoman will do a dance.
Finding Cat Eyes
If you have problems finding Cat Eyes, press Y to use your cat vision. Some of them are hidden behind posters and other objects.
Easy Battles
When battling Laurel Hedare, Tom Lone, or the man in black who tries to kill her, always attack them from the back. You will be able to hit them about three times before they attack again. Otherwise, you will just roll away and get hurt.