Passwords...
	Unlock everything...

Password	Effect
BBBBCG	Level The Royal Tower (England)
CBBDCX	Level London Subway (England)
DBBFCM	Level Street Chase (England)
FBBFFQ	Level City Streets (China)
GBBPFH	Level Secret Hideout (China)
HBBPKN	Level Golden City (China)
JCBPKQ	The Palace (China)
KCBTKC	Opera House (Italy)
LCGTKJ	Canal Chase (Italy)
MCHTKL	Fashion District (Italy)
NCHTTC	Scuba Search (Italy)
PCRTTN	Sunny City (Mexico)
TTTTTS	All Secrets Unlocked

Choose the "Continue" option in the main menu, then submit the password TTTTTS.