Cheat List
     Enter cheats at extras option in the main menu:

Cheat code:             Result:
CEILINGFAN              2000 skin
WOODCHIPPER             1990 skin
NAILGUN                 1980 skin

More Cheats:
     Get  a  gold  medal  rank  on  the  indicated level to unlock the
corresponding  cheat  in  an  apartment  sub-menu.  Note:  You  cannot
progress in the game if any cheats are enabled.

Crazy Deaths            Lucky's Bar level
Gun Splitters           Crack House
Unlimited Ammo          Pier 74 Revisited
Invulnerability         All levels
No Reloads              Stark Towers
One Shot Kills          Ryker's Island
Unlimited Slaughter     Takagi Building