Sure, you've called every number you've found on those hard-to-get 
Collectibles, but you certainly haven't
found all of the phone numbers. Chances are, you've overlooked a phone 
number or two without even
knowing it as you ripped out a goon's heart. All 25 'secret' phone numbers 
are scattered throughout New
York and can be seen on anywhere from flyers and storefronts to garbage cans 
and posters. Dial 18 of the
25 on a phone-in no specific order -to unlock the final secret of the game.