i was jus readin some shit about gta iv and heres what it says on wikipedia
NPC behaviour
* Police and wanted levels will now operate differently. When the police are in search of Niko, the player will now have to avoid
a certain radius marked on the map in which the police will be looking for him. The size of this radius will increase with the player’s
wanted level (the more stars, the bigger the radius) and re-centres itself on Niko’s location if he is spotted by the police.
Instead of utilizing the “Pay ‘N’ Spray” as in previous games, Niko has to realistically disguise himself by clandestinely changing
vehicles in empty areas such as parking garages, a feature seen in the video game Mafia: The City of Lost Heaven. When on foot,
police will not shoot at Niko unless he has committed a serious offence. If they catch up to Niko, he will put his hands up and the
player has a chance to run away. Additionally, pedestrians with cellphones can now report crimes.[31][32] The player also now
has the option when arrested to attempt to escape before the handcuffs are slapped on.[26][/code][code]NPC behaviour
* Police and wanted levels will now operate differently. When the police are in search of Niko, the player will now have to avoid
a certain radius marked on the map in which the police will be looking for him. The size of this radius will increase with the player’s
wanted level (the more stars, the bigger the radius) and re-centres itself on Niko’s location if he is spotted by the police.
Instead of utilizing the “Pay ‘N’ Spray” as in previous games, Niko has to realistically disguise himself by clandestinely changing
vehicles in empty areas such as parking garages, a feature seen in the video game Mafia: The City of Lost Heaven. When on foot,
police will not shoot at Niko unless he has committed a serious offence. If they catch up to Niko, he will put his hands up and the
player has a chance to run away. Additionally, pedestrians with cellphones can now report crimes.[31][32] The player also now
has the option when arrested to attempt to escape before the handcuffs are slapped on.[26][/code]