Grand Theft Auto 4

Reach the part of the game where Niko and Roman have a safehouse in South Bohan. In the house on the left of the table near the television is a pile of books. The middle purple book of a stack of three is titled "Madness & Blasphemy: The Do's and Dont's". This is an reference to the movie 300 where in the "This is Sparta!" scene, the lines "This is blasphemy! This is madness!" are spoken.

The final mission "A Revenger's Tragedy" is a reference to the play and movie based on the play titled The Revenger's Tragedy.

Kill all 200 pigeons. The Annihilator is armed with rockets.

Use any emergency vehicle, turn on the sirens, and drive (speed does not matter). The booth attendant will open the gate and you will have saved $5.

When in a car or a motorcycle, drive up to toll booth. Stay on the far side of the booth. Niko will stick his arm out, but not put money in the basket. The gate will still open.

Ride a motorcycle to the side of the pay toll wall. You will not pay a toll if you can drive through the small gap on the sides.

During the bowling date with Michelle, when you enter the bowling alley notice the neon bowling alley sign. Look closely to see that it resembles male genitalia.

Select the first lane (all the way to the left). Take two full steps to the left. Hold Right Analog-stick Down for about a half second, then press Right Analog-stick Up. Do not add any aftertouch to the throw.

Get any car. When you get to the race, wait until the race starts. Immediately after it starts, shoot out at least one tire on each car, but make it quick.

Hold [Accelerate] + [Brake] to do a burnout. If you keep doing this, the smoke will change color and eventually your tires will burst.

If you do a burn out long enough you will blow out your back tire(s). In a car, go left until you see lots of smoke then go to the right.

In order to call a taxi, position Niko near traffic, preferably somewhere on the sidewalk. Spot a cab and press L1. Niko will automatically call out for a taxi. It is also possible to order a taxi with the cell phone if you have problems spotting one. Additionally, Niko can eventually earn the ability to call a limo as you progress in the game.

You can also approach a taxi that already has a fare from the passenger side, then pull out the passenger and get in.

Dial "911" on your cellphone. You will reach a voice menu that will allow you to call the police by dialing "1", an ambulance by dialing "2", or a fire truck by dialing "3". Select the vehicle of your choice and wait for them to arrive. The will stop and look around for the emergency, allowing you to easily steal their vehicle.