To unlock everything, enter this password: 41TK1S6ZNGV.

Enter the following passwords to unlock the corresponding level:

Rooftop Rumble: Y*PSC**K**4
This Traffic Is Murder: F*FNK*TKFKH
No Way To Treat A Lady: CCKMC*R*B*P
A Question Of Honor: 0CKN**4**KR
Fighting With Shadows: WCP7D*CDGKM
Over Troubled Waters: H**7LBK5**D
Master Of The Hand: 4**3NB23GKL
Descent Into Madness: MCP3NBY5B*L
Into The Savage Sewers: MCF2J*K5ZKD
Battle Below Ground: RCK6JB4VW*L
The King Commands: RCK2QBRVXKB
Wrong Side Of The Tracks: RL*7S*RXHKM
Out Of The Darkness: MNF39*MVJKN
No Return Ticket: 4LTPZBP5R*K
Switchback: RST21BK3SKK
Like Looking In A Mirror: RQYQZCPV8*M
Bad for Business: 4QYQ7CK39KC
Long Hard Climb: 4S2PZC459B[DD]

Note: * indicates the DD symbol.