Car on Happiness Island On the west side of Happiness Island, there is a random spawn that can be a car. This is unusual as there is no way a vehicle can be brought on to the island unless unloaded by a ship.
Sultan RS behind an abandoned mansion Behind an old, run-down mansion in Westdyke, Alderney at the end of the dirt roads, there is a hidden and extremely rare Sultan RS parked in some bushes. This is practically the only way to find the car in-game. The only other way to obtain it is if the game has it stored in the temporary memory (perhaps because one appeared in one of Brucie's Races), and automatically spawns it parked or driving around the streets.
Re-start a breakdown vehicle by phone If the player's vehicle has been damaged to the point that the engine has stopped, calling any number on the mobile phone will start it again. This does not work if the car is incinerating.
Face of the statue & the Hot Coffee
The Statue of Happiness' face bears a striking resemblance to former U.S. Secretary of State Hillary Clinton. This resemblance, along with the cup of coffee in her right hand, may be a reference to the Hot Coffee controversy which Clinton took investigation in, also suggesting that new regulations be put on video games.
Heart of Liberty Within the Statue of Happiness is a giant beating heart, supposedly the "Heart of Liberty City." In GTA IV, access into the area is only achievable via an entrance marked by a "No Hidden Content This Way" sign at the upper level of the statue's pedestal, which can only be reached by helicopter. Once inside the pedestal, the player must scale a ladder up to the midsection of the statue, where the heart is located. It can be shot at, but nothing happens. In The Ballad of Gay Tony, if Luis drinks too much and blacks out, he will wake up at random locations after the black screen, one of which may be the Heart of Liberty City.
Maverick's warning message There's an unsettling warning message about the Maverick inside the cockpit that can be seen if the player looks in first-person mode. It implies this: "This helicopter might crash but we really don't care if it does, refer to flight manual for help."
Packie's brain-box If the player positions the camera in such a way that the player is able to see inside Packie's head, a small cube with Packie's balaclava texture from Three Leaf Clover can be seen.
Strippers' black-box Similarly as Packie's brain-box, some of the strippers has a little black box inside their head.
Police Brutality Inside the East Holland LCPD Station, it is possible to see three cops and someone on the ground. Another police brutality can be found at the northern beach of Boulevard, Bohan.
Burger Shot disclaimer Under the menu of Burger Shot, the player can see this disclaimer: "This Burger may kill you! We can't be held responsible"
Car wreck off the cliff At the end of the street in south side of Beachgate, over the broken fence, there are two car wrecks off the cliff.
Statue capped with traffic cone Inside the courtyard of Civilization Committee Building at Hatton Gardens, there is a statue with a traffic cone on its head.
Tomb of Meadows Park Church In the graveyard behind the Meadows Park Church, there is a tomb or cenotaph with the epitaph below: Roll of Honor "War of the Deadline" 1869-1869 "for those about to build...... we salute you"
Tai Chi on the rock On the huge rock of the beach in south-east Westdyke, there is usually somebody practicing Tai Chi on it.
Impregnation warning sign At the Eugenics' warehouse in Port Tudor, a warning sign placed at the north-west corner of the building, that wrote: "Ladies! Please wear protection. It's unlikely but not impossible you may be impregnated upon visiting Eugenics Inc."
Photocopier in TW@ At all TW@ internet cafes, behind the cashier's desk, and also inside various vehicle dealerships, the screen of the Kakagawa Power Ultra 3000 Pro photocopier reads: ERROR Unleash ninja guru lol. This can only be seen through the scope of a Sniper Rifle.
Mr. Tasty & the GTA IV theme music While driving the Mr. Tasty, the player is able to trigger songs to play by clicking the horn. One of these songs is the theme song of GTA IV. While this song is playing, call ZiT and they will text back with "ZiT! Spotted GTA IV Theme". This resembles a cheat that gives the player health, armor and ammo, but this will also block some achievements and trophies in the game.
Blood trail behind Faustin's house In the backyard of Mikhail Faustin's home, there are two blood trails on the ground.
The rules of Outlook Park At the entrance of Outlook Park, the player can see a sign with the rules: no eating, no drinking, no dogs, no children, no ball games, no hotdogs, no running.
The most expensive kids meal The highest price meals in Cluckin' Bell restaurants is "Little Clucker" ($8.00) and "Little Peckers" ($8.00), both of them are meal for kids.
Veggie Wings may contain meat The Cluckin' Bell new "Veggie Wings" with a row of disclaimer below: "may contain meat".
Clean Hands, Clean Conscience On the paper-towel dispenser in Cluckin' Bell restaurants with the text of "Clean Hands, Clean Conscience".
Cash register in Cluckin' Bell On the cash register of Cluckin' Bell restaurants, the player can see the text on it likes: "Holy Shit", "Veg Crap", "Medium, Extra Medium, Medium XL", "Ask CJ", "Launch Missiles", "Space Lazer" etc.
Plaques of the fossils There is an easter egg in The Libertonian; the plaque describing the Tyrannosaurus Rex and Triceratops. The texture of the text is low-resolution, and thus hard to read properly, but reads, roughly: "This big bastard took a few days to knock up because it had to be done by the sole hand of a prop artist. But alas, and feast your eyes on this 21000 poly maniac. Trex right up your arse. How do you like them apples?".
Prison chart In the missions done for Gerald McReary while he is in prison, a chart can be seen behind Gerald during the cutscenes for the mission. There are several names written on it, all of which are puns, including "Isaac Hunt" (I's a cunt), "Seymour Fani" (see more fanny), "Richard Head" (dick head), and "Phil Mcreavis" (fill my crevice).
In the night sky If the player scopes the night sky with a sniper rifle on a clear night, they will find some galaxies, stars and a flying thumb, in the thumbs up position.
Easter eggs references to previous games
Graffiti found on certain run down apartment corridors.
A modified version of the above image.
The "RIP/we'll miss you" graffiti On the staircases in most apartment blocks in the game, the player may spot some graffiti referring to past protagonists set in GTA III canon (Claude, Tommy, Carl (CJ), Toni, and Vic), that suggests they have died, though it is likely metaphorical as GTA III canon is over so they won't be seen again. The only on-screen death of a protagonist so far is Victor Vance and Johnny Klebitz . The graffiti is intended to serve as "a little joke for fans of the series", as a different design approach to GTA IV meant the games' timeline could only inherit various fictional brand names and certain radio personalities; it is, however, no indication as to whether or not GTA III canon has been retired.
Myths from San Andreas There is a Liberty Tree article that talks about urban myths in Liberty City. This could be referring to the myths that were created around San Andreas.
Babiesovernight.com One of the in-game radio advertisements is for an online service called Babiesovernight.com. The tagline at the end and the background music are evocative of the commercial in GTA III for Petsovernight.com.
Claude's outfit When Playboy X is killed, it is possible to go to his apartment and open the wardrobe to get a change of clothes that look like the clothing of Claude, the protagonist of GTA III.
Street-artist's artworks display On Happiness Island, in front of the entrance to the statue, it is possible to find a street-artist's easel/display stand with several pictures. These pictures are all concept works of many previous GTA characters. The easel can also be seen in south-central Algonquin, very close to where Hossan's random encounter takes place and in front of the The Libertonian.
Hot Coffee in Liberty City There are signs scattered throughout Liberty City that say "Hot Coffee Shop", clearly a reference to the Hot Coffee sexual content and controversy from GTA San Andreas
San Andreas on TV One of the TV shows is a program called The Venturas Poker Challenge. It features a casino in Las Venturas from GTA San Andreas. When shown, the commercial doesn't have GTA IV graphics and art, it features GTA San Andreas graphics, the most obvious being the building designs and taxi. Similarly, footage of the Vinewood sign from GTA San Andreas is used for another TV ad; it is recognizably San Andreas animation due to the transmission tower visible right behind it, which was also in the earlier game.
Chiliad8888 Niko can receive an email from Chiliad8888, which calls the recipient "Pilgrim", makes many spiritually- and philosophically-charged (and anti-government) comments, ends with "Feel the Truth, Live the Freedom", and links to whattheydonotwantyoutoknow.com. On this website there is a discussion topic titled, "Jump to a new level of Spirituality" posted by "Trooth". This discussion thread includes more philosophical thoughts, mentions Peyote, and provides a map of the Unique Stunt Jumps in Liberty City. "Chiliad" was also the name of a location in San Andreas (the highest mountain, in the southwestern wilderness). These clues suggest that the author of the email and discussion topic is The Truth, a character from GTA San Andreas.
Drawing on prison chart If looking closely at the chart behind Gerry on the prison, the player is able to see the penis-shape drawing the students in GTA III had drawn.
CJ billboard A Fruntalot billboard outside the Algonquin safehouse shows a man ressembling CJ, drinking wine.
Sprunk There is a Sprunk manufacturing plant in Alderney and a vending machine at Romans taxi depot. Sprunk was featured in GTA Vice City, GTA: San Andreas, and Manhunt. It has returned to GTA IV with a brand new look. Also notice that "Sprunk" is a mix of the words "Sprite" and "Spunk". The sign outside the factory is very similar to a sign for Pepsi-Cola that appears in the film "The Great Gatsby."
San Andreas mentioned During a multiplayer race in GTA IV if the player equips a certain Female face (possibly 2) then hits a car in traffic or another player's car while pressing the talk button (PS3 or LB Xbox 360), the character will sometimes exclaim, "This isn't San Andreas you hippie, DRIVE!"
Vice City postcards In the bars are postcards featuring Vice City. Vice City is also advertised in airfare billboards near the airport.
Easter eggs references to other games
Republican Space Rangers On the TV channel Weazel, there is an animated TV show called Republican Space Rangers, which spoofs the Halo series, as it features space marines wearing a green armor that resembles the MJOLNIR armor as seen in Halo. In one scene, the Rangers fly their spaceship through a ring that resembles a HALO ring.
Artworks of Videogeddon On the wall in the arcade place Videogeddon in Chinatown, there are several sprites on the wall resembling those of old games. One of the sprites is a blond man, with a long mustache and plumber-like black clothes. The sprite resembles Super Mario from the Super Mario Brothers series.
"Well excuse me dorkwad!" Certain random female NPCs will, upon being pushed, exclaim "Well excuse me dorkwad!", a possible reference to the Legend of Zelda cartoon.
Jimmy Hopkins-a-like with Bullworth Academy vest A pedestrian bearing an uncanny resemblance to Jimmy Hopkins, the protagonist of Bully, can be seen roaming the streets of Liberty City. He is even wearing a Bullworth Academy vest. He is, however, much more aged but does have a similar buzz cut hair style.
Finish Him!! The achievement/trophy "Finish Him" may be a reference to Midway's Game (present day Warner Bros) Mortal Kombat.
Assassin's Greed The achievement/trophy "Assassin's Greed" is a reference to the Assassin's Creed video game series.
Midnight Club The achievements/trophies "Join The Midnight Club" and "Top The Midnight Club" may be a reference to Rockstar's Midnight Club video game series.
Easter eggs references to media culture
Cluck Norris in Cluckin' Bell In Cluckin' Bell restaurants, near the back of the store, there's an action figure of a man in a martial arts position wearing a chicken hat; printed on the glass is "Cluck Norris", a reference to film/television star and martial artist Chuck Norris.
Madness & Blasphemy: The Do's and Dont's In the second apartment that is unlocked after a mission (Located in Bohan), there are books sitting on a table near the TV. Shoot one of the books and there is another underneath titled Madness & Blasphemy: The Do's and Dont's written by Nuck Chorris. This is also a reference to Chuck Norris. The title of this book also makes reference to Frank Miller's film 300, where Leonidas' famous "THIS IS SPARTA!" shout was preceded by "This is blasphemy! This is madness!"
"Hey! I'm walking here!" At the beginning of Clean Getaway, Vlad is nearly hit by a taxi and shouts "Hey! I'm walking here!" in reference to the movie Midnight Cowboy.
"I'm gonna be okay!" When the player harms a cop sometimes they will shout "I'm gonna be okay!", referring to Reservoir Dogs, when Mr. Orange is shot in the abdomen and is screaming in delirium.
"If I was that big chimp, I would climb it too." If the player goes on a Heli Ride with Brucie, and when reaching the Rotterdam Tower, Brucie might say "If I was that big chimp, I would climb it too." This is a reference to King Kong.
2 Girls 1 Cup referenced The viral video, 2 Girls 1 Cup, is indirectly referenced to numerous times on the radio.
The Flintstones referenced The Euphoria files in \Grand Theft Auto IV\GTAIV\pc\data\naturalmotion on PC are called Fred.art and Wilma.art
Microsoft and Kodak logos Two real life logos appear on the back of the Panoramic DVD player; the logo for Kodak and Microsoft Windows (more specifically, Windows XP) appear. In addition, all of the computers in the game use the same mouse cursor featured in Microsoft Windows versions 1.0 to XP.
Mission name references to media culture
Concrete Jungle Named after the hit song of Bob Marley. The song is also in the official soundtrack. Also, if the mission for some reason fails and is restarted, Little Jacob will, on the drive back to the Homebrew Café, refer to the underground of Liberty City as "a messy concrete jungle".
Tom Goldberg the lawyer In the mission, Final Interview, the lawyer Tom Goldberg, which Niko has to kill on orders of Francis McReary, is supposedly based on a real-life disbarred lawyer, Jack Thompson, who is an activist against violent video games for minors and is a well known arch-enemy of Rockstar. One of the lines Goldberg says when Niko pulls out a gun during the interview is a real-life reference to one of Thompson's famous lines against violent shooting games that are "murder simulators" is "Guns don't kill people, video games do!"
Double your breasts In Cluckin' Bell, the slogan of "The Mighty Cluck" is "200% bigger breasts", referring the rumor about the KFC's chickens pumped too much hormones and cause the customer with larger breast even for men.
Economic recession of United States The game references to the economic recession faced by the United States on a few occasions.
Al's Furniture In Willis, there is a shop called Al's Furniture. This is a reference to Italian-American gangster Al Capone, who was officially the owner of a furniture shop.
Paper factory as a cover The fact that a secretive government body operates out of a paper factory may be a reference to the TV show Heroes. A secretive organization in that show also uses a paper factory as a cover and much of the action takes place in New York.
Smoke outside complains There are a lot of people complaining that they have to smoke outside. This is a reference to New York City, where people mustn't smoke inside either.
Easter eggs about in-game street names
In Broker, roads running North-South are named after Native American tribes—Iroquois, Oneida, Mohawk, Onondaga etc.
In Broker there are the street names "Cassidy" and "Sundance", a reference to the outlaws, Butch Cassidy and the Sundance Kid.
The Beatles: Broker contains the streets "Ringo St" and "Starr St", both references to the Beatles member Ringo Starr. In Dukes there's a Harrison St., probably a reference to George Harrison, and the northwest section of Liberty City contains the Long John Ave, name that John Lennon used at the beginning of his career. Paul McCartney references are not found yet.
Also on the side of buses, there is a small ribbon saying "here, there and everywhere" which is a reference to the Beatles song "Here, there and everywhere".
Many street names in Bohan are named after prisons—Leavenworth Ave, Alcatraz Ave, Sing Sing Ave, Guantanamo Ave, Attica Ave, San Quentin Ave, Folsom Way (best known from "Folsom Prison Blues" by Johnny Cash), Rykers Ave (named after the Rikers Island prison on the East River of New York City), and Joliet Street (Joliet, Illinois).
Avenues running north-south (vertically) in Algonquin are named alphabetically after American cities. "A" is at the eastern side of Algonquin; "G" at the western. The names, in order, are Albany, Bismarck, Columbus, Denver, Exeter, Frankfort, Galveston. Denver and Exeter run concurrently ("Denver-Exeter Ave.") south of Middle Park into Star Junction.
Streets running east-to-west (horizontally) in Algonquin are named alphabetically after different types of minerals. "A" is at the southern end of Algonquin; "X" at the northern end. The names in order are Amethyst, Barium, Calcium, Diamond, Emerald, Feldspar, Garnet, Hematite, Iron, Jade, Kunzite, Lorimar, Manganese, Nickel, Obsidian, Pyrite, Quartz, Ruby, Silicon, Topaz, Uranium, Vauxite, Wardite, Xenotime.
In South Alderney, the street names reflect (mostly antiquated) military terms—Musketeer, Grenadier, Chariot, Phalanx etc.
In Alderney, some streets are named after cult leaders: Hubbard St., Applewhite St., Koresh Square
Some streets are named after tools—Jackhammer, Plumbbob, Tinderbox, Drill.
Some streets are named after insects—Caterpillar, Worm, Butterfly.
Some streets are named after foods—Onion, Asparagus, Chive.
Some streets are named after colonial Settlements—Yorktown, Delaware.
Some streets are named after famous surnames—Harrison, Hancock, Livingston.
Some streets are named after nuclear tests—Plumbbob, Emery, Niblick, Ivy, Hardtack, and Trinity.
Some streets are named after inventors—Edison, Schneider, Moog, Drebbel, Farnsworth, Cockerell.
The street in Northwood named Astoria's full name is Astoria Place. This could possibly be a take on Astor Place in the Lower East Side.
The Clocktower In BOABO, Broker, there is a building called, "The Clocktower" and it has a digital clock that displays the in-game time. When driving on the Algonquin Bridge at night, leaving Algonquin, it is possible for the player to spot the word CLOCKTOWER lit up except the "L" is not lit and it says "COCKTOWER".
Sign of Memory Lanes The outside sign for the Memory Lanes bowling alley depicts a bowling pin with two bowling balls on either side of it. Inside, however, the sign is only a neon outline, and resembles a crude drawing of male sex organs.
Pißwasser beer Another beer brand is named "Pißwasser", "wasser" being German for "water" and "ß" is a German letter for "ss". An advertisement for Pißwasser shows a woman with the bottle in her mouth as if in an act of fellatio.
AutoEroticar The logo for AutoEroticar is a car resembling a penis. The name is also a play on 'auto erotica', the act of self-pleasuring.
Tw@ The series of internet cafes known as Tw@, is a clear reference to the female vagina. When the "@" is pronounced as "at".
Pawn Stars There is a pawn shop in Lower Easton, Algonquin that is called "Pawn Stars", a innuendo for Porn Star. Many think it is supposed to reference the show "Pawn Stars" on History, but that show didn't air until after GTA IV was released.
Cluckin' Bell's restrooms Another thing in Cluckin' Bell is the names above the restrooms. The male restroom says "Cocks" above it and the female restroom says "Chicks" above it.
No chickens are choked There is a sign of "No chickens are choked when preparing our food (That's a promise)" in the Cluckin' Bell. "Choke the chicken" means the act of masturbation.
Cluckin' Bell's cock Meals at Cluckin' Bell prefer to use the word "cock" instead of "chicken".
Dildo on rubbles In many spots around Liberty City, there is rubble on the ground; in some of this rubble, the player can see a purple dildo sticking out. This is the same dildo used as a weapon in GTA San Andreas.
Golden Pier Swingers Golf Club Looking at the golf courses carefully from a height reveals that they are penis-shaped.
Dusche Gold beer A brand of beer in the game is called "Dusche Gold". "Dusche" is German for "shower", so it translates into "shower gold", a reference to "golden shower", the act of urinating on someone.
Posters in hospitals In hospitals, there are posters about sex.
Bernie's flower picture In Florian's (Bernie's) apartment, in his family room, there is a picture of a flower that represents the male genitals.
Easter eggs about languages
Viendemorte One of the restaurants is called "Viendemorte", which sounds exactly like "viande morte". It means "dead meat" in French.
Bugs & Glitches
TVs in multiplayer mode While playing multiplayer, some of the TVs in safehouses and the TV in the MeTV building, show the game's pause menu without the map.
Firefly Projects' swing At the Firefly Projects, there is a park with a swing set. If the player drives backwards (or forwards with some vehicles such as a Voodoo) onto it, the swing set will catapult the vehicle high in the air. This is likely a bug in the game's physics simulation. See Swing Glitch article for more details.
Runaway gangs Normally hostile pedestrians will flee. Go into any stripclub and either shoot it up or spend some time with a stripper. Then go to areas where there are gang members that will become hostile if they are bumped. Punch them and they will run away. Drivers that normally would get out and try to harm the player if the player punches or hits their car will also flee. This only has a temporary effect.