 
- Answering machine phone numbers
The following is a list of answering machine phone numbers to enter at any phone:
555-7373: Butcher 
555-2284: Jenny 
555-7735: Paulie 
555-4263: Retailer 1 
555-5664: Retailer 2 
555-6402: Sarah 
555-8672: SBZ
Bring down the Chopper.
Complete game on normal setting.
Dial 555-4263 at nearest train station.
Complete the first part of the game.
- Bringing People Together (5)
Trap 5 enemies within a Black Hole.
Finish a multiplayer match with less than 5 deaths (minimum of 4 players).
Claim 20 Killing Streaks in multiplayer.
Devour 300 enemies.
Enter one of the following numbers at any phone to active the corresponding cheat function. If you entered the code correctly, you will hear a message.
2K Darkling 
Enter "555-4263" as a number to unlock the 2K Darkling.
Golfer Darkling 
Enter "555-5664" as a number to unlock the Golfer Darkling.
- Collectable phone numbers
Enter one of the following phone numbers at any phone to unlock a collectable:
555-4463 
555-4525 
555-4603 
555-4649 
555-4676 
555-4682 
555-4691 
555-6418 
555-6441 
555-6454 
555-6503 
555-8164 
555-6713 
555-6799 
555-6892 
555-8416 
555-8766 
555-8856 
555-8881 
555-8896 
555-8989 
555-1093 
555-1228 
555-1229 
555-1234 
555-1266 
555-3249 
555-3318 
555-1917 
555-1952 
555-3429 
555-3440 
555-3452 
555-3492 
555-3495 
555-3496 
555-3520 
555-5197 
555-3791 
555-3794 
555-5211 
555-3849 
555-5311 
555-5327 
555-5438 
555-5439 
555-5465 
555-5466 
555-5477 
555-5549 
555-5569 
555-5595 
555-5619 
555-5709 
555-7467 
555-7526 
555-7614 
555-7641 
555-7642 
555-7643 
555-7710 
555-7761 
555-9345 
555-9588 
555-9868 
555-9903 
555-9913 
555-2575 
555-2734 
555-2763 
555-2764 
555-4336 
555-2941
Go to any pay phone and dial one of the following numbers. You will hear a message to confirm correct code entry.
Effect - Code
Collectable 1 - 555-4463 
Collectable 10 - 555-6118 
Collectable 2 - 555-4525 
Collectable 3 - 555-4565 
Collectable 4 - 555-4569 
Collectable 5 - 555-4603 
Collectable 6 - 555-4649 
Collectable 7 - 555-4676 
Collectable 8 - 555-4682 
Collectable 9 - 555-4691
Unlock 100 collectables.
Find Vinny Mortarello in the Fulton Street Station. There's an open window in an apartment building across from Shrote's building. The Construction Outfit is inside the room as well as Collectible #45.
Be on the winning side in 50 multiplayer matches.
Acquire Black Hole.
At any in-game phone dial 555-GAME (555-4263) you will unlock a special Darkling.
Acquire all Darkling types.
Only for those who are completely in tune with the Darkness.
- Defeating the darkness in his dreamworld
When you've released the darkness in his dreamworld you need to defeat him some way to get control of him. What i did was when i interacted with the 4 strange stair thingy's the darkness was released. then i ran back and sit in a corner so i didnt get hit by his Black Hole. If you stay in the corner he only sends some beserkes. 2 atta time. just kill the beserkers till he stops attacking you. at that point walk up to him and press A to suck up the darkness. This time you control it according to the storyline.
Note: DO NOT SHOOT AT HIM, he only gets stronger if you do. just keep killing his beserkers and now and then cap a bullet in his body to make him active again, cuz he tends to do nothing when sitting in the corner. show your face once a while. | 
Submitted by EtJuH- Defeating the Darkness in the castle
To defeat the Darkness in the castle (after you have blown open the gate), go up to every chair you see in the main room. Each chair will prompt you to activate it. Note: This does give away your Darkness powers for the time being. After the Darkness appears as a red/evil Jackie, put any guns away so that just your hands are out. This will stop his attacks. Then, walk up to him without any guns out, and a prompt should appear to "Accept Him". The fight will then be over.
- Easy Bringing People Together achievement
Go to the last level at Paulie's mansion. Once you get to the point where you are inside the mansion, use your Black Holes repeatedly and hide in the darkness to regain your energy. You should get the achievement easily.
When you get to Dutch Oven Harry's place, talk to Roach. Do not shoot at him until he starts shooting.
- Easy Romantic achievement
Simply wait until you kiss Jenny during the movie, then look over at her to get the "Get up and leave" option. You do not have to watch the entire movie.
About three hours into the game, after you pass the cold storage part, you will end up in a hallway with a lot of doors you can open. The middle door will have some computers and an enemy that never heard the gunfight because he is watching a television with some headphones. Kill him and the television will be yours to use. The option to change the channel will be given to you. Change the channel and some music videos and cartoons will pass. Wait a few seconds to see what is coming on next. There will be one with some cheesy music and words, and white lines coming out. This is actually a movie from 1955 called The Man With The Golden Arm starring Frank Sinatra. You can watch the entire movie on this television.
Kill 25 enemies using execution moves.
Collect all the Darkling outfits.
Find Jimmy the Grape in the Canal Street Station. Talk to him to activate the objective. Pete's in a nondescript apartment building down Grinder's Lane. It has a small parking lot outside. Pete's inside room 261. Break in and handle the enemys. Grab the Fireman Outfit.
Capture 50 flags in a CTF match.
Capture 20 flags in a CTF match.
Unlock 25 collectables.
Find a peaceful solution. At least momentarily.
Dial 555-5664 at nearest train station.
Kill 30 enemies using Darkness Guns.
Kill 7 enemies within 15 seconds.
Acquire Creeping Dark.
Take enough damage without dying within a multiplayer match.
Help those in need.
Be on the winning side in 20 multiplayer matches.
Acquire Darkness Guns.
Be on the winning side in a multiplayer match in any of the multiplayer modes.
Complete the second part of the game.
When you are about to give up the Darkness guns and extract the Darkness, look at the Demon in the middle. Look behind him in the bright light and you should see Jenny.
In Hunters Point Alley, it's inside the same room as Collectible #97.
- Keeper of the Secret (10)
Someone's waiting by the phone.
- Keeping the zombie soldiers dead
When you are in the "Otherworld" (you will go there after you die the first and second time), the Germans soldiers almost always get back up after you kill them. The only way to make sure they remain dead is to devour their hearts.
The following is an easy way to keep the zombies dead when you die. Kill them with the demon arm, and throw them off the ledge. Note: This only works outside. If you throw them off the ledge inside a building, they will not die. Instead, they will follow you up to the level you are on. You can also devour their hearts to keep them dead.
Perform a melee kill for the first time.
Complete game on hard setting.
- Legendary Executioner (20)
Kill 50 enemies using execution moves.
Summon 50 Darklings.
Find Dana Cutrone in Canal Street Station. Talk to her to activate an objective. You have to get her keys back from her boyfriend. Once in the apartment you'll find the Lumberjack Outfit . the room along with collectibles #4, 40 and 90.
Be on the winning side in 100 multiplayer matches.
Be on the winning side in 5 multiplayer matches.
Claim 20 Killing Streaks in multiplayer.
Acquire Demon Arm.
Achieve maximum Darkness level.
Capture a flag in a CTF match.
Unlock a collectable for the first time.
In Chinatown, there is a flashing object near the Darkling portal. Shatter the glass and grab the Potato Sack Outfit. Sitting against alley wall near metro exit.
Kill 30 enemies using Demon Arm.
Kill the workers in the tunnel.
At City Hall Station enter the train to grab the Roadworker Outfit.
Kill 15 enemies using Creeping Dark.
Real guys stick around for their ladies.
When you finally reach Jenny's new appartment she's gonna ask to watch TV with her. stay on the sofa for a while till Jenny starts to kiss you, which could take several minutes. When the 2 of you are done kissing you'll get a message that you've just unlocked the Romantic achievement. | 
Submitted by EtJuHSure, 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.
Effect - Code
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
Summon 5 Darklings.
- Surviving the mansion ( Final level )
When uve arrived with the boat on Pauly's mansion kill all people asap. then eat their hards to keep the darkness's shield up. once upstairs take out al the MAC lights shining from the mansion. once you've done that go and sit behind a corner and take control of your 'snake'. Kill most of the people with stealth kills. when the garden is almost empty rush to the front door.The enemy's keep spawning, so when its clear really run as hard as you can. ( depends on diffeculty how fast u must run ). once you reach the door you'll get a movie where the darkness freaks out. more powerfull then ever. after that make your way up the lighthouse and finish your dear uncle pauly ;. then sit back and enjoy. | 
Submitted by EtJuH- Take a Look at the Sky (50)
Take down 6 airplanes.
Unlock 50 collectables.
Be on the winning side in 250 multiplayer matches.
- The Obsessive Collector (15)
Unlock 75 collectables.
Simply enter the phone number at any payphone from within the game to unlock a collectable and remember there are acheivment points for collecting 1, 25, 50, and 100 collectables. Thats 4 EASY acheivments totalling 40 points, not to mention the hours of searching to find the numbers in game!
Effect - Code
Collectable 01 - 5554463 
Collectable 02 - 5554525 
Collectable 03 - 5554565 
Collectable 04 - 5554569 
Collectable 05 - 5554603 
Collectable 06 - 5554649 
Collectable 07 - 5554676 
Collectable 08 - 5554682 
Collectable 09 - 5554691 
Collectable 10 - 5556118
- Up Close and Personal (5)
Perform an execution move for the first time.
Kill 20 enemies using Black Hole.
- More Cheats, Achievements