Taxi Side Missions

When a player enters a taxi in any of the Grand Theft Auto III series of games, they can perform side missions.

In the GTA3 series
In the taxi side-mission, the player can earn money by delivering pedestrians to their predetermined destination within a time limit. Starting the mission lights up the taxi's roof-mounted taxi sign encouraging nearby pedestrians to flag the player's taxi down. The alloted time given is calculated roughly from the distance to the destination, and an additional 30 seconds is granted upon completing a fare to find another one. If the player runs out of time, exits the vehicle or has too many accidents or damages their vehicle too badly, the passenger will flee, ending the mission.

In GTA: San Andreas the taxi sub-mission has much less strict time limits, but adds a "tip meter" which rewards players for delivering fares quickly and safely and punishes them for driving recklessly or taking too long.

Rewards
GTA III
 * Bonus Borgnine cab. (100 fares)

GTA: Vice City
 * All taxis gain hydraulic jump capability. (100 fares)

GTA: San Andreas
 * All taxis gain nitrous. (50 fares)

GTA: Liberty City Stories
 * Bonus Bickle '76 taxi. (100 Fares)

Taxi Fares In GTA2
In Grand Theft Auto 2, the player could drive around in a taxi and pick up pedestriant. There was no set destination or time limits, the passenger would exit the vehicle randomly when the care was stopped.