The Airtrain (name based on the model file), also known as Aeroplane (name based on the texture file) or Air Train (name based on in-game name) is a passenger airplane that appears in Grand Theft Auto III, Grand Theft Auto: Vice City, Grand Theft Auto: Liberty City Stories and Grand Theft Auto: Vice City Stories.
It functions as a scenery prop in all it's appearances and can only be entered (But not pilotable) using a glitch in Vice City Stories.
The Airtrain takes the appearance of a white Boeing 727. In all it's appearances, the airplane is featured in two different ways: Some are stationary solid props in airports and others are seen landing, taxing and taking off.In Grand Theft Auto III and GTA Vice City, the flying airtrains are not solid, meaning the player can go through them without taking any damage. Simply spawning the Airtrain using trainers or modifications will crash the game. The Airtrain's flight path is determined by the flight1.dat file.
In GTA Liberty City Stories it is solid, however, touching it's wheels will heavily injure the player and destroy his vehicle. The player can jump on it's wing and "ride" on it while it takes off, yet he will be automatically ejected into the sea a few seconds later, after reaching the game height limit.
In GTA Vice City Stories it is still solid and will once again make the player loose health when on contact with it's wheels. The appearance of the stationary version slightly differs from previous games - It now seems to have an extra floor for it's cockpit, similar to a 747. Also, instead of being simply painted white with different airliner logos, it is now painted white with a red tailfin and blue nose (with a Plummet Airlines logo). The airtrains that land and take off still look the same as their previous versions.
The flying version of the plane can be entered in GTA Vice City Stories due to a bug - If the player gets on it's wing and presses triangle near the fuselage, he will enter the airplane. The player doesn't have any control of the vehicle itself and can only change the radio stations while it flies on it's pre-defined route over Vice City - Therefore, technically being similar to purchasing a flight in GTA San Andreas. Oddly, the player can only exit the Airtrain when it's back wheels are touching the ground but not the front one, which is when it takes off and lands. It can also be spawned using a cheat device, although the player cannot control it if it is entered using the aforementioned bug.
- The Airtrain in GTA San Andreas is revealed to have performance stats similar to drivable vehicles in the game (see vehicle stats in GTA San Andreas), but does not appear in the final build of the game. This suggests the vehicle was originally to be developed into a controllable vehicle, but was dropped during development, with the AT-400 succeeding the Airtrain. It could also simply be a leftover from Vice City since the model's hierarchy remains the same and does not match that of San Andreas's. However, most of the Airtrain's data can be found within game files, including its model, texture, in-game text and the aforementioned handling code.
- In GTA Liberty City Stories, if the player is driving a vehicle toward the Airtrain, and bails out, the vehicle will not explode after crashing into the Airtrain. However, re-entering the vehicle will detonate it, and the player will die or lose a lot of Health.
- In the GTA III beta, the Airtrain was destroyable, as seen in one of the trailers.
- The name "Airtrain" is a parody of Airbus .
- "Airtrain" could also be a parody of AirTran, a North American low-cost airline.
- It is possible to fly the Airtrain in GTA Vice City Stories through cheat devices. The vehicle will be named AEROPLANE on the bottom right corner.
- The name "AT-400", which is the successor of the Airtrain that appears in San Andreas, could stand for "Air Train 400".