Cars no longer explode when flipped over.
Grenades can be thrown from cars.
You can push pedestrians out of the way using the B button on the Xbox 360 (presumably Circle on the PS3).
Police AI has been improved and they won't shoot unless you've committed a serious offence, running from them will cause them to open fire.
Different melee attacks can be preformed by holding down the right trigger and pressing Y, X or B.
The cover system is similar to that in Gears of War, you can also blind fire.
You'll notice characters breathing when it's cold.
Some of the gangs in Liberty City are the Mafia, Jamaicans, Triads and Irish.
Some in-game bridges have tolls.
Spinners (on wheels) have been implemented due to the community's requests.
Niko has an e-mail account and also uses RSS feeds. These can be accessed at any TW@ Internet café
Radio stations will often report on events you've caused (e.g. completing missions, killing mob bosses)
After running over a pedestrian blood spatter appears on the bumper and windshield of the car.
- The faster you tap X, the faster Niko runs. He doesn't appear to get tired.
- Major collisions on motorbikes cause the helmet to fall off. You can see it fall onto the ground.
- Heavy fire will scar - and permanently destroy - parts of the environment.
- They previewed a mission called "To Live and Die in Alderney," which is the second part of "Truck Hustle." The second mission is called "Jamaican Heat," and acts as a tutorial for the new cover/targeting system. The third mission is called "Jacob's Ladder," and the fourth (and final) mission is called "Harbouring a Grudge." This mission introduces an Irish character called Patrick McReary, who is related to Francis.
- The mobile phone can be used to call the police, the paramedics, and the fire department.
- There are 18 radio stations in GTA IV - one of which is Russian. All of these stations can be accessed via the mobile phone.
- You can take photos with the mobile phone and upload them to the police computer.
- Health is represented by a green semi-circle on the left side of the radar, and a right semi-circle represents armour. You can restore health by resting, by using medical kits, and by eating.
- In taxis, you can ask the driver to change the radio station by pressing D-pad left or right.
- The GTA 4 equivalent of the Lincoln Tunnel is known as the Booth Tunnel.
