The Darkness

Credit to PS3Cheats.com

2K Darkling:
To unlock 2K Darkling, dial 555-GAME(555-4263) at a phone booth.

Golfer Darkling:
To unlock Golfer Darkling, dial "555-5664" at a phone booth.

Unlockables:
Go to a pay phone and dial any of the following numbers. A message will confirm correct code entry:

New York 1 Canal 1 - 555-2941
New York 1 Cemetery 1 - 555-5465
New York 1 Chinatown 1 - 555-8989
New York 1 Chinatown 2 - 555-7526
New York 1 Chinatown 3 - 555-3318
New York 1 Chinatown 4 - 555-5709
New York 1 Chinatown 5 - 555-3440
New York 1 Consite 1 - 555-9345
New York 1 Consite 2 - 555-1093
New York 1 Fulton 1 - 555-4525
New York 1 Fulton 2 - 555-5211
New York 1 Fulton 3 - 555-9903
New York 1 Grinder 1 - 555-9868
New York 1 Grinder 2 - 555-7642
New York 1 Grinder 3 - 555-4649
New York 1 Grinder 4 - 555-8416
New York 1 Hunters Point 1 - 555-3429
New York 1 Hunters Point 2 - 555-3520
New York 1 Hunters Point 3 - 555-2734
New York 1 Hunters Point 4 - 555-3492
New York 1 Hunters Point 5 - 555-4682
New York 1 Hunters Point 6 - 555-5438
New York 1 Lower East 1 - 555-7710
New York 1 Lower East 2 - 555-1266
New York 1 Lower East 3 - 555-5311
New York 1 Lower East 4 - 555-9588
New York 1 Lower East 5 - 555-6441
New York 1 Orphanage 1 - 555-1234
New York 1 Orphanage 2 - 555-7643
New York 1 Orphanage 3 - 555-8881
New York 1 Orphanage 4 - 555-5569
New York 2 Canal 1 - 555-2763
New York 2 Canal 2 - 555-5619
New York 2 City Hall 1 - 555-3849
New York 2 City Hall 2 - 555-5466
New York 2 City Hall 3 - 555-3794
New York 2 City Hall 4 - 555-6799
New York 2 Gunhill 1 - 555-5477
New York 2 Gunhill 2 - 555-9913
New York 2 Gunhill 3 - 555-5197
New York 2 Gunhill 4 - 555-4691
New York 2 Lower East 1 - 555-8164
New York 2 Turkish 1 - 555-3791
New York 2 Turkish 2 - 555-3452
New York 2 Turkish 3 - 555-2575
New York 2 Turkish 4 - 555-4676
New York 3 Canal 1 - 555-6418
New York 3 Grinder 1 - 555-7614
New York 3 Lower East 1 - 555-1952
New York 3 Mansion 2 - 555-6503
New York 3 Pier 1 - 555-3496
New York 3 Pier 2 - 555-2764
New York 3 Pier 3 - 555-1917
New York 3 Pier 4 - 555-4603
New York 3 Pier 5 - 555-8896
Other World 2 HQ 1 - 555-7761
Other World 2 HQ 2 - 555-1228
Other World 2 HQ 3 - 555-6892
Other World 2 HQ 4 - 555-3495
Side New York 1 Chen - 555-8856
Side New York 1 Cutrone - 555-1229
Side New York 1 Hadel - 555-5549
Side New York 1 Pulanski - 555-6454
Side New York 1 Warburton - 555-8766
Side New York 2 Cups - 555-6713
Side New York 2 Deval - 555-5595
Side New York 2 Hadel - 555-4336
Side New York 2 Mortarello - 555-5327
Side New York 2 Willis - 555-3249
Side New York 3 Blackmoore - 555-5439
Side New York 3 Scardina - 555-4463
Side New York 3 Terrone - 555-7641
Side Other World 2 Guns - 555-7467

Construction outfit:
Look for Vinny Mortarello in the Fulton Street Station. There is an open window in an apartment building across from Shrote's building. Go through the window to get the Construction Outfit and Collectible #45.

Fireman outfit:
Look for Jimmy the Grape in the Canal Street Station. Talk to him to activate the objective. Pete's in an apartment building down Grinder's Lane. There is a parking lot outside. Pete's inside room 261. Break in and kill the enemies. Get the Fireman Outfit.

Jungle outfit:
The Jungle outfit is located in Hunters Point Alley inside the same room as Collectible #97.

Lumberjack outfit:
Find Dana Cutrone in Canal Street Station and talk to her. You have to get her keys back from her boyfriend. Once in the apartment grab the Lumberjack Outfit and collectibles #4, 40 and 90.

Potato Sack outfit:
In Chinatown, look for a flashing object near the Darkling portal. Shatter the glass and grab the Potato Sack Outfit that is sitting against the alley wall near metro exit.

Roadworker outfit:
The Roadworker outfit is located in the City Hall Station inside the train.

Secret phone numbers:
Secret 01 - 555-6118
Secret 02 - 555-1847
Secret 03 - 555-6667
Secret 04 - 555-4569
Secret 05 - 555-9985
Secret 06 - 555-1037
Secret 07 - 555-1206
Secret 08 - 555-9528
Secret 09 - 555-3285
Secret 10 - 555-5723
Secret 11 - 555-8024
Secret 12 - 555-6322
Secret 13 - 555-9132
Secret 14 - 555-6893
Secret 15 - 555-2402
Secret 16 - 555-6557
Secret 17 - 555-2309
Secret 18 - 555-4372
Secret 19 - 555-9723
Secret 20 - 555-5289
Secret 21 - 555-6205
Secret 22 - 555-7658
Secret 23 - 555-1233
Secret 24 - 555-3947
Secret 25 - 555-9562
Secret 26 - 555-7934
Secret 27 - 555-7892
Secret 28 - 555-8930
Secret 29 - 555-3243
Secret 30 - 555-3840
Secret 31 - 555-2349
Secret 32 - 555-6325
Secret 33 - 555-4565
Secret 34 - 555-9898
Secret 35 - 555-7613
Secret 36 - 555-6969

Answering machine phone numbers:
Butcher - 555-7373
Jenny - 555-2284
Paulie - 555-7735
Phone retailer - 555-5664
Sarah - 555-6402
SBZ - 555-8672

Extra content:
Enter any of the following numbers at a phone in the subway or at Jenny's house to unlock extra content:

9345
1234