Vault 22

 is a Vault-Tec Vault made before the bombs fell in 2077. The Vault door is opened, and creatures such as mantises can be seen outside. It is located south of Griffin Wares Sacked Caravan, east of Jacobstown and west from the Thorn.

Background
Vault 22 was part of an agricultural experiment that involved the growing of spores which eventually led to the mutation of the inhabitants of the Vault as well as dense vegetation. The mutation was distributed through the ventilation system. There were reports of noises in the vents, which turned out to be praying mantises that have mutated over time. Due to the intense growth of plants the vault has been dubbed the "Jungle Vault". NCR soldiers have mentioned stories about the Vault throughout New Vegas. The Courier has the choice of completing the quest There Stands the Grass in which you explore Vault 22 to retrieve scientific data and research.


 * You will have to visit this vault as part of the quest Still in the Dark.

Location
Vault 22 can be found by traveling directly southwest from Horowitz Farmstead. The entrance is located in a valley against the east face of the mountains, contrary to where it is located on the map (that being perhaps where the Vault is centered).

Traveling through the Vault
Once inside the dimly lit Vault, the player will encounter spore carriers and spore plants. The vault has five floors, as follows: The different floors can be accessed by repairing the main elevator within the Vault (requires repair skill of 50) or accessed (less efficiently) by staircase.
 * 1) 1st floor - Main Entrance
 * 2) 2nd floor - Oxygen Recycling
 * 3) 3rd floor - Food Production
 * 4) 4th floor - Common Area
 * 5) 5th floor - Pest Control

The key card to access the tunnels is located in the Crew Quarters in the first bedroom on the left side on a shelf just inside the door. GLITCH: Sometimes the Key Card will not visibly appear. Try removing items and looking around and there may be an option to pick it up, although you may not be able to see it.

Access to the crew quarters is given via the Overseer's Terminal

Frag Grenades can be found in the second floor room where Keely briefs you on the plan to destroy the spores; these are helpful in order ignite the gas on the fifth level

Notable Loot
The AER14 Prototype Laser Rifle is located here. To obtain it, go through the fifth floor, Pest Control, and enter the stairway door to the common area which has a very easy lock. The AER14 is laying on the ground next to a scorched skeleton.


 * AER14 Prototype Unique laser rifle, Common areas, see above section.
 * HEPA 20 cartridge filters x6 (used for Still in the Dark) if you go through the caves (on third level) and come out at the second level.
 * Programmer's Digest Next to a mattress, under a book in the little camp set up at the vault entrance.
 * Cave Fungus
 * Doctor's Bag
 * Mantis egg
 * Tales of a Junktown Jerky Vendor (In the lab room in the area "Pest Control", but on the "Food Production" level. Its on / near (it can get knocked off easily) the table with the bubbling vials. If you took the caves to get to Pest Control, its the first room. If you took the elevator, turn right and go up the stairs and go straight.
 * Flamer (Inside the room labeled Utility)
 * Super Stimpak
 * Recon armor << I could not find this... could someone please confirm that it's really there, and if so, give some details as to where it is exactly? (thanks)
 * A food additive next to a terminal in food production (given to Cpl. William Farber in Camp McCarran)

Enemies

 * Giant mantis nymph
 * Giant mantis
 * Spore carrier
 * Spore plants

Bugs

 * The Vault Door Itself Has a Texture Error it is number 92 instead of 22, Providing the possibly that the vault had a different number at one time in development.


 * If you have a companion set to wait and you use the elevator, the companion will spawn next to you when you leave the elevator.


 * Some of the numberless doors in the crew quarters have a very faint "101" on them. This is also seen in Fallout 3's Vault 87.

Appearances
appears in Fallout: New Vegas.