| ||For the settlement that appears in Fallout 2, see Gecko (town).|
| ||This is an overview article which contains background information and cross-game comparisons. For game-specific information and stats, see the articles linked on the right.|
Geckos are mutated and enlarged creatures prized for their sleek and durable hides. Before the Great War, they could be found in warm climates throughout the world, ranging from 1.6 cm to 60 cm, with the particularity among other lizards to making chirping sounds in social interactions with other. After the Great War, they've mutated, causing them to grow giant and taking on a humanoid form, because of their exposure to the mutated F.E.V. of the West Tek Research Facility coming from the air, and some with other toxic conditions.
They are reptilian in appearance and have a pair of fins behind their head. Their eyes have generally an orange tint, and their body colors differ greatly based on the gecko type. Also, all geckos have five fingers, five toes and keeping their ability to making chirping sounds in social interactions with other. Gruffly breathing, squeaking and cooing can be heard from time to time. Most geckos are peaceful, unthreatening creatures. However, if one gecko is attacked, the rest of the pack in the area will converge on the attacker, charging quickly with their mouths open and attack rapidly with bites and swipes from their clawed hands.
They have no strictly hierarchical social structures, there is no leader and everyone is equal in the pack. They having a principle of extended family with generally an unified pack (only regular geckos and silver geckos have seen to be sometimes adopted by a pack of golden geckos), immature geckos learn from their parents and other pack members until they grow up and teach in turn their offspring. Also, some have seen to have a hunter function for the pack. Like deathclaws, they are oviparous, with the eggs typically covered by the father or the mother before the hatching and not laid into a place. Vagabond in nature, they rarely make prolonged nests and are always on the move.
Normal geckos and golden geckos have hides that can be turned into all sorts of useful and attractive clothing items.
The regular gecko is a small-medium sized gecko with indigo skin. Like their cousins the silver geckos, they are mostly peaceful but tend to be rather aggressive in groups. They are very fast and use their numbers to rush and overwhelm the opponent. They can be found only in the Mojave Wasteland.
Silver / little geckoEdit
The silver gecko, also called little gecko, is a small sized gecko with silver skin. They are the smallest and least offensive geckos. They are not very aggressive and not very resistant to damage. They can be found only in southern Oregon.
The golden gecko is a medium-sized gecko with rich, golden hide. They are a rarer, but also deadlier type than the regular or silver gecko. They can be found around irradiated areas in which they lick up toxic waste, causing their particular mutation different than any other kind of geckos, and making their attacks irradiate the opponent. They can be found in southern Oregon and in the Mojave Wasteland.
The fire gecko is a medium-large sized gecko with dark violet skin. They are the second deadliest kind of gecko after the green gecko and, as indicated by their name, can breathe fire, due to their constant exposure to sulfur that is now held in their digestive system. Unlike other geckos, they also have large spikes that cover their heads down to their lower back. They are immune to fire and their hides are far too mangy and burnt to have any value. They can be found in northern California and in the Mojave Wasteland.
The green gecko is a large sized gecko with shiny light green skin. They are the most deadly kind of gecko, and they can spit several slow-moving and far-reaching globs of poisonous saliva similar to centaurs. Despite their fragile appearance, they have a high resistance to damage. The cause of their mutation is currently unknown. They can only be found in Zion Canyon.
- In Fallout 2, the quest perk Gecko Skinning allows the player to skin silver gecko and golden gecko (not fire gecko). In Fallout: New Vegas, you are able to take the hide of any kind of geckos directly, and if your survival skill is high enough, you can tan the skin at a campfire.
- In Fallout: New Vegas, geckos are considered animals for purposes of the Animal Friend (with the exception of the fire gecko), Animal Control, and Hunter perks.
- Green geckos were first planned to appear in Fallout d20 before finally appearing in the Fallout: New Vegas add-on Honest Hearts.