At any in-game phone dial 555-GAME (555-4263) you will unlock a special Darkling.
Complete the following achievements to unlock Xbox Live Gamerscore points.
Go to any pay phone and dial one of the following numbers. You will hear a message to confirm correct code entry.
Below a list of Unlockable Outfits...
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. :
Answering machine phone numbers: