Three stars
A three-star wanted level in Grand Theft Auto: Vice City.

At a three-star wanted level, pursuing police vehicles become more aggressive, driving at maximum speed, and the police will also begin to set up armed roadblocks on main roads. A police helicopter is also called in to assist and its crew follows the player, putting a spotlight on the protagonist (at night), and shoots at the player via an invisible machine gun on the fuselage if they get a clear shot and yell various humorous remarks over a loudspeaker. Additionally, in GTA Vice City, the police helicopter may occasionally deploy a SWAT unit onto the ground to attack the player. From GTA Vice City onwards, police officers begin to deploy spike strips to puncture the player's tires, making driving difficult. In GTA San Andreas, from this wanted level on, officers who come out of either a Police Car or Ranger will also ocassionally wield shotguns. Additionally, in GTA Vice City and GTA Vice City Stories, undercover Vice Squad detectives armed with Uzis and driving Cheetahs also give chase.

For the case of Grand Theft Auto: San Andreas, any potential date involving a girlfriend except Denise Robinson at this wanted level will be rendered null and void, instead resulting in the date being cancelled and progress being decreased, with the message "That's it, you bored her legs shut!".

Three wanted stars are attained by:

Continuing to retaliate against law enforcement (evading capture or death by any means)
Continuing to cause collateral damage (killing civilians and destroying vehicles)
Entering police impound garages in GTA San Andreas
Blowing up an AI controlled full-winged Dodo (the DeadDodo) in GTA III and GTA Vice City
Trucking hot goods in San Andreas
Breaking out Cam Jones in the mission No Escape? in Grand Theft Auto: Vice City. (iOS and Android versions only)
grandtheftwiki.com/Wanted_Level_in_GTA_III_Era