Furons look almost exactly like Greys, except Furons don't have noses. They are hairless greyish-blue humanoids with large eyes and large craniums. They have circles on the sides of their craniums (where your ears would normally be located) that glow with energy. All Furons have reflective eyes with no true eye color, three fingers with one thumb and the same foot size. The males have wrinkled skin, while the females have smooth, pale skin and lack the aforementioned light circles. Furons are noted for being small, frail creatures; they are easily reduced to paste when smacked into a wall. To make up for this lack of resilience, Furons have developed personal energy-shielding technology. Though they are not physically strong, Furon warriors are able to carry around very big guns with no trouble at all.
Furons appear to share some characteristics with humans, such as being able to breathe oxygen. Furon genitalia may also be compatible with that of a human, because Furon/Human hybrids have been created on at least one occasion. The Furon lifespan is supposedly about five hundred years, but they can clone themselves, so they are virtually immortal. Since they live on a barren world, water is scarce, and as such, Furons lack the ability to swim. It is possible there is frozen or even liquid water under the surface of their planet, though it is speculated that alternative forms of life may be able to use ammonia or liquid methane as a solvent.
Furon society can be quite cruel. Most Furons are very xenophobic and think little of wiping out entire races, enslaving them, or using them as toys. The species-wide ability to read minds forces some Furons to always tell the truth if encountering another Furon. Comedians are seen as pointless, but action movies are very popular. Somehow, when Furon names are translated, they turn out to be the names of several diseases and parasites.
The Furon population is split into different ranks. There are leaders, scientists, workers, and soldiers, though there's little biological difference between each group. Large heads are prized by the Furons and are seen as status symbols, possibly signifying brain power.
Despite the fact that cloning degraded their genes and nearly wiped out the entire species, Furons rely on cloning for everyday life. Due to the overeliance on cloning, a Furon is able to take a vacation while his or her clone is still at work. Despite that, Furons with a high number of clones are seen as reckless, due to the fact they've been killed several times due to their behavior. Furons with a low clone count are seen as the elders. Furons also consider themselves to be immortal, mostly due to the fact their clones carry their personalities. The only way to truly kill a Furon is to delete it from the cloning banks, ensuring the said Furon won't just clone himself and come back to kill you. And as long as only one of a particular clone, say Crypto, exists, the consciousness and possibly soul is moved to the next clone. If there are multiple clones, the minds are separated as individuals.
The beginnings of the Furon Empire remain vague. What is known is that they encountered humanity early in their expeditions into space, and apparently procreated with them, thus leaving a bit of Furon DNA in their descendants. Earth was apparently forgotten, or it was not deemed important enough to take over at the moment. Following this event, the Furon Empire finally took shape as it conquered more worlds.
The Martian War
At one point, the Furons discovered Mars and encountered the Blisk. The reasons for the war remain unclear, although it is implied the Blisk were very cocky about their radioactive ocean world, annoying the Furons. The Blisk War was particularly bloody as standard Furon weaponry proved ineffective, leading to the development of stronger atomic weaponry. The war resulted in several Furon casualties, the loss of their reproductive capabilities, the endangering of the Blisk species, and the terraforming of Mars into a dry, dead world.
The DNA Crisis
During their war with the Blisk, the Furon DNA was mutated, unfortunately leaving them sterile. The only thing keeping the Furons from dying out now was a cloning process. However, it was later discovered that the cloning process led to each new clone's being increasingly defective. The search for pure Furon DNA led to Earth's rediscovery in the Fifties. The following invasion, which was proposed and led by Orthopox 13, was a success. With a major superpower under Furon control and a steady supply of DNA being farmed, Cryptosporidium 138 became the first Furon in eons to have fully functional genitalia. Though the crisis appeared to have been solved, most of the Furon DNA that had been collected was destroyed when the Soviets up and decided to nuke the Mothership. The Furons on Earth then dedicated themselves to recollecting the DNA, unaware of new developments happening on the Furon homeworld.
At one point, synthetic Furon DNA was created by the Master, ensuring that the Furon clones would not become unstable. The Furon party on Earth was not notified and were actually misled by the Master. Crypto and Orthopox returned to the Homeworld, or rather the Fourth Ring of Furon, and assassinated Meningitis. Following the Master's own death while attempting to take the vacant throne, Orthopox 14 crowned himself emperor of the Furon Empire.
Furon technology is quite advanced, though most of their technological efforts are focused on military applications. The Furons are also very skilled in the field of biotechnology, though it's only used for modifying their own bodies by giving themselves stronger mental powers. Cloning is also an area the Furons have mastered, allowing them to clone themselves in order to attain immortality.
In Destroy All Humans! 2, Furon religion is discussed. The Furons believe in a god called Arkvoodle, also called the "Lord of the Sacred Crotch" and is shown to have idols, leftover from a previous Furon encounter, all over the surface of the Earth. One of the legends surrounding Arkvoodle is the coming of a "Sacred Son of Arkvoodle" who will restore the Furon's genitalia in the second coming of Arkvoodle. Cryptosporidium was deemed to be this Sacred Son, and started a cult dedicated to Arkvoodle on Earth, though it was abandoned. It is still unknown when Arkvoodle shall return.
- According to one of the promotional videos found in the special features of the first Destroy All Humans! game, the planet Furon was originally known as Gorta.