Secrets and EASTER EGGS

In Three Leaf Clover with Packie, if you position the camera properly Gerald McReary you can look inside his head - inside there is a box with a picture of a skull on it.
Added by BionicAndroid
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 ****), "Seymour Fani" (see more fanny), "Richard Head" (d*ck head), and "Phil Mcreavis" (fill my crevice).

• 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 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 Ballad of Gay Tony if you drink too much you will respawn at random locations, one of which may be the Heart of Liberty City.
  
  
• You can access the roof of Playboy X's penthouse suite by jumping on a power box to the right of the patio door. However the player must jump from a certain point of the box to grab onto the roof, jumping too close to the edge oddly will not allow the player to make it onto the roof. It is possible for footprints to appear on top of the box, indicating exactly where Niko's feet must be to make the jump. It has also been observed that these footprints will turn to blood spatters after shooting someone, and will only reappear when you are standing on the box and are being shot at, thus drawing your own blood.
  
  
• The lake in Middle Park resembles the shape of an alien. This can easily be noticed on the map or from the air in a helicopter.
  
  
• At the Firefly Projects, there is a park with a swing set. If you drive backwards (or forwards with some vehicles such as a Voodoo) onto it, the swing set will catapult the vehicle you're in high in the air. This is likely a bug in the game's physics simulation. See Swing Glitch article for more details.
  
  
• While driving the Mr. Tasty, you can 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 you back with "ZiT! Spotted GTA IV Theme". This is a cheat that gives the player health, armor and ammo, but also disables some achievements.
  
  
• 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.
  
  
• If you take a helicopter ride from Brucie Kibbutz, or you go for a helitour, there's an unsettling warning message about the helicopter inside the ****pit that you can see if you look in first person mode that says "This helicopter might crash but we really don't care if it does, refer to flight manual for help."
  
  
• In The Lost and the Damned, the dash of the Rhapsody has a sticker of Wayne and Garth from the movie Wayne's World.
  
  
• While playing multiplayer, all TVs in safehouses show the game's pause menu without the map.
  

I ll post some more ..If you know any more please post it here..

Great work in finding all of these mate

Yeah really nice work..

My favorite is and always will be the heart of Liberty.

The OT has been updated (Made into list for easier reading)

Well it's looking great as a list..

Great work on the list dude....Just correct the BB code here:

Ash wrote:

[*}At the Firefly Projects, there is a park with a swing set. If you drive backwards (or forwards with some vehicles such as a Voodoo) onto it, the swing set will catapult the vehicle you're in high in the air. This is likely a bug in the game's physics simulation. See Swing Glitch article for more details.

Thanks alienx