Aliens

Aliens, also known as extraterrestrials, are creatures that did not originate on Earth. They appear in Grand Theft Auto V as easter eggs and figments of Michael's imagination.

Description
Their bodies are similar to the from the   series, while their elongated head is reminiscent of the  from the  franchise. They have green skin, large crescent-shaped heads, and large mouths with big teeth.

Aliens in Older GTAs

 * Grand Theft Auto - Mentioned briefly during Heist Almighty - Penetrator: the protagonist is tasked to rescue an unnamed man who invaded an Army base, and when they pick him up, he claim he's got secret files regarding aliens.
 * Grand Theft Auto: San Andreas - Reptilian aliens are spoken of by some pedestrians and the Area 69 base intercom mentions an alien body during the mission there. According to the Epsilon Program, aliens are present on Earth. There is also a small bar near Area 69 called the Lil' Probe'Inn which has an alien/UFO theme.
 * Grand Theft Auto IV; The Ballad of Gay Tony and The Lost and Damned - Some pedestrians (mostly the homeless ones) ramble about aliens.

Prologue
The mission guides the player to drive ahead over the railroads but instead, turn right and go under the bridge, stop the car, get out, and the player will notice that there's a frozen alien in the river.

Franklin and Lamar
Aliens also appear during the mission Franklin and Lamar, where an alien movie, Republican Space Rangers is being filmed. They are actually not aliens but people costumed into aliens while the movie casting takes place, and they could be more or less an Easter Egg. At the same time, Franklin and Lamar are racing through the studio at high speeds. Not hitting any of the alien-dressed actors will count for the 100% mission score, checking the "We come in peace" box.

Grass Roots
Playing the mission as Michael will trigger a hallucination after smoking pot. Michael's vision and hearing become blurred and the world around him appears to be in a haze. He is suddenly hefting a minigun as aliens begin to appear all around him. Michael must defeat the aliens without dying himself.

Barry, the man who gives Michael weed in the mission, refers to the aliens as "monsters" (The fact that Trevor hallucinates about clowns instead indicates the "monsters" might vary depending on the person).

Did Somebody Say Yoga?
Michael goes with Jimmy to a Burger Shot to score weed and a "special drink" from his dealer who works there. On their way back home, Michael experiences the onset of a psychedelic trip after taking a sip of Jimmy's ketamine-spiked drink. Jimmy then forces his father out of the Tailgater, and drives off. Michael then hallucinates being surrounded by monkeys, abducted by aliens, and then dropped off midair floating over the city.

Bury The Hatchet
The alien frozen under the railway bridge seen in the Prologue is still there in this mission. To see it, just follow the same steps as above.

Other Appearances

 * In Sandy Shores, near the train tunnel and across from the airstrip, there is an area 'dedicated' to aliens. It is a mound which has been decorated/painted with alien faces and shapes with numerous phrases such as 'Save Us' and 'Beam Me Up'. There is also a rusted, unusable Regina with a model UFO on its roof. There are generally a few Campers or Surfers parked nearby too, suggesting this is more of a 'hippy camp' type area, rather than a community thing.
 * West of the Redwood Lights Track in the Grand Senora Desert is a house marked by an American flag in the front yard. In the back yard is a small gathering of 'hippies' and a painted banner which reads 'WELCOME' next to a green alien head.
 * In the enhanced version of GTA V, in the Director Mode of the Rockstar Editor, the player can control and use one of the actors that was using the alien costume during the mission Franklin and Lamar.
 * A movie called "Los Santos 2020" features an alien.
 * There is a statue of an alien's head in Solomon Richards' office in bookcase. It can be seen during the Murder Mystery side-mission when the player has access to free-roam his office.
 * The player can see an AlienProber3 movie poster and magazine inside Lester's House.

Appearances in Grand Theft Auto Online
As part of the Gunrunning update, a special resupply job was added where during the night a crashed flying saucer surrounded by several dead Military personnel and scientists, as well as abandoned trucks, tanks and SUVs can be found. When the player takes the "supply" (an alien egg), several aliens will suddenly appear before the player. They are not hostile and disappear when aimed at.

This resupply job may appear once the player has completed at least 600 resupplies and started a new supply run between 21:00 and 23:00. Due to this event being randomly scripted, it is not guaranteed to appear as soon as the player has completed 600 resupplies.

As a reference to the theory that aliens anal probe the people that they capture, the bodies of the scientists and military personnel scattered around the crash site have blood seeping through their clothes around their anal areas.

Transportation
As a method of transportation the aliens use UFOs, or referred to popularly as "flying saucers" or "flying discs". One appears during Michael's hallucination in the mission Did Somebody Say Yoga?, which is used to do experiments on human beings. A sunken UFO can be found at the north of the map at the bottom of the sea. Also, after achieving 100% Completion, a UFO can be seen on top of Mount Chiliad during stormy weather. Oddly, it has "FIB" written on it, which might mean that the agency knows about their existence and even managed to build an UFO by themselves. This model of UFO is identical to the sunken one, albeit less dirty. This same model of UFO also appears above the Beam Me Up location in Sandy Shores. A very different style of UFO appears high above Fort Zancudo, its location marked with a spinning green light that appears on top of one of the fort's buildings from 3AM to 4AM.

Mount Chiliad Drawing
A mysterious drawing on a wall in the Mount Chiliad cable car station appears to show the mountain with lightning emanating from it and an odd symbol, possibly an eye or a UFO, on top. Other notable details on the drawing are depictions of a UFO, a person on a jetpack, a cracked egg, and multiple boxes with Xs in the middle of them. Nothing else is known about the meaning of the drawing.

Under the observation platform on top of the mountain is the same symbol featured on top of the drawing. Carved on the side of the platform are the words "Come back when your story is complete". This serves only to inform the player that they must reach 100% completion in order to see the UFO. This same symbol is also painted on the side of the mountain and in the Beam Me Up area in Sandy Shores, along with a drawing of a rain cloud and the moon, another way to inform the player of the UFOs viewing requirements, in this case being stormy weather and the time being 3AM.

Grand Theft Auto V

 * The aliens' presence is likely a tribute to the aliens in Grand Theft Auto: San Andreas.
 * Other Aliens are mentioned in the game, partially the,  and.

Außerirdische Alienígenas