Tear Gas

In real life, tear gas is generally considered to be a non-lethal weapon, but in the world of GTA, it's anything but. Granted, it does take prolonged exposure to the gas to kill, but in confined spaces, this can be arranged. However, seeing as the gas causes people to stop what they are doing while they cover their face and cough, the most practical use for this weapon is to slow enemies down while the player is trying to escape or switch to another weapon.

In Grand Theft Auto: Vice City, Grand Theft Auto: Liberty City Stories and in Grand Theft Auto: Vice City Stories, by deploying the Tear Gas too close to the player, he too, will lose health from the noxious gas, and the longer he stays there, the greater he loses his health, thus dying, much like other pedestrians. In Grand Theft Auto: San Andreas Tear Gas can be used to attack pedestrians, while the player is unaffected and can freely walk around the gas, until the smoke subsides. By dropping more Tear Gas, the smoke will be longer and any pedestrians or cops enters the smoke will be choked on by the toxic gas until finally dying.

The Tear Gas is not meant to be obtained in GTA Vice City, GTA Liberty City Stories and GTA Vice City Stories. However, the weapon is fully functional and can be obtained only by using trainers or modifications.

Grand Theft Auto: Vice City

 * Washington Beach - Behind the Washington Beach Police Station (PS2 original version only)

Grand Theft Auto: San Andreas

 * Behind the Dodo planes at Las Venturas Airport
 * On the tarmac in the restricted area at KACC (behind the main buildings and over a fence).
 * On the steps of the building west of the car lot under the Mulholland Intersection, Los Santos
 * Inside aircraft carrier in Easter Basin Naval Station
 * Given to the player during the mission Breaking the Bank at Caligula's

Glitch
There is a glitch in GTA San Andreas involving the Tear Gas. It is demonstrated in this video. NwsKnKXg7wg