Player City Building Guide

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Getting Started

As of patch 18.7, you can buy almost all buildings required to fill your shiny new Alien Invasion City. They can can be purchased fully constructed from the Tower Shops located in Borealis, Old Athens, Rome, and ICC.

However, if you still want to build the buildings yourself, you can, and this guide will explain you how. The Sauna building is not buyable and can only be built. Most parts can be found in the tradeskill department of Fair Trade stores, in the ICC Architecture Supplies terminals. Alternatively you can visit
Uncle Bazzit's shop
Newland Desert - 1546x2710
in Meetmedere, but the QLs of the items don't go as high as in Fair Trade.

Building QL

The first thing you need to know is what QL building you want to make (Range: QL1 - QL300). The QL of a building is decided by one item used in the process: the Generic Organic Immunity System. A QL300 will give you a QL300 building, and a QL1 will give you a QL1 building. Simple and easy. You can either buy it from Fair Trade or Bazzit's shop, or build it yourself.

To build it, you have to gather a Solid Clump of Kyr'Ozch Bio-Material. Alien Drop. These can be refined by using a Kyr'Ozch Structural Analyzer. The only problem is that clumps can turn into several types of items, so cross your fingers and hope for a Kyr'Ozch Viral Serum. This is what you need to make a high QL Generic Organic Immunity System. Secondly, you need a Manteze Scout Nasal Membrane. You will find these membranes (perhaps unsurprisingly) on Manteze Scouts. These can be found on the
eastern coast of 4 Holes
4 Holes - 1952x1772

Combine the items like so:

  +    =  

Requires 4.5x the QL in Electrical Engineering.

  +    =  

Requires 3.5x the QL in Pharmacy.

Creating the Buildings

The first thing you need to know is the difference between Regular Building Structure and Advanced Building Structure. This has nothing to do with the QL of a building, but with the type.

There are three buildings built from Advanced Structures:

  • Headquarter
  • Market (obsolete as of patch 18.5)
  • Guard House

And the rest are built with Regular Structures:

  • Grid House
  • Notum Mining Operations
  • Notum Silo
  • Landing Pad
  • Satellite Uplink
  • ECM Tower
  • Swimming Pool
  • Sidewalk Cafe
  • Sky Bar

To make any kind of building, regular or superior, you always need to make a Regular Building Structure. The QL of this structure is, as mentioned, decided by the QL of your Generic Organic Immunity System, and will also decide the QL of the end product. You need to buy Generic Volatile Nanobots, HSR Compressed Regenerating Bioplate (one per building structure) and Blueprint - Regular Building Structure (reusable tool) to make a Regular Building Structure.

Combine them as follows.

Regular Buildings

  +    =  

Requires 400 in Pharmacy.
Optionally see below for a cheaper but more time consuming way to make Strong Regenerating Bioplates.

  +    =  

Requires 4x the QL in Mechanical Engineering.

Now you can make all of the regular buildings. All you need is to buy a Floorplan and put it together like so:

Advanced Buildings

To make an Advanced Structure you need to upgrade your Regular Building Structure. You'll need the following items:

Looted from
Giant Chirops
Stret West Bank - 2001.1x1828.9

Looted from
Scarlatina Omuses
Central Artery Valley - 946.8x1858.8

Looted from
Salt Worms
Perpetual Wastelands - 408.9x1503.7

See above how to build it

Combine everything like so (QL 300 HQ as an example):

  +     =  

Requires 400 in Pharmacy.

  +     =  

Requires 400 in FieldQuantumPhysics.

  +     =  

Requires 4x QL in Mechanical Engineering.

Be aware that there are 3 types of HQ and Market floorplans: small (QL 1-100), medium (QL 101-200), and large (QL 201-300). Be sure to pick the right one. Also, note that Floorplans are NODROP.

Alternative way to make Strong Regenerating Bioplates

This option is a cheaper, but more time-consuming way to make Strong Regenerating Bioplates.

You'll need the following items:

Looted from
Stret East Bank - 1180x2580

Looted from
Rollerrat Queens
Wailing Wastes - 2350x970


Combine everything like so:

Creating the Sauna Building

The Sauna building is built a little different from all the others.

You'll need the following items:

From the Condemned Subway
From the Temple of Three Winds
From the Foreman's Office
From the Crypt of Home
From the Inner Sanctum
From the Dust Brigade Outpost (DB1)
From Inside the Machine (DB2)
From Sectors 35 and 42
From Alappaa
From the Biodomes and Mitaar
From Vortexx
From Albtraum
From Sector 10
From Sectors 13 and 42
From Sectors 28 and 42

Combine everything as follows:

  +    =  

  +    =  

  +    =  

  +    =  

  +    =  

  +    =  

  +    =  

  +    =  

  +    =  

  +    =  

  +    =  

  +    =  

  +    =  

  +    =  

  +    =  

  +    =  

  +    =  

  +    =  

Buildings Bonuses

We all have come to like our /org contracts from Notum Wars. Now we will also come to like /org city - for it shows what we get for the money. And it's going to be a lot of money. Anyways, house bonuses work like contracts - buffs scale with level. All the buff values I mention apply to a lvl 200 char and are for ql 300 buildings.



All Abilities: +9
Run Speed: +90

The HQ is the prerequisite to owning other buildings. The HQ also has a grid terminal. Apart from that, HQs also have different nice rooms. All size HQ has a Laboratory that buffs the following tradeskills: Mechanical Engineering, Electrical Engineering, Quantum FT, Pharmaceuticals, Nano Programming, Weapon Smithing, Chemistry, Psychology (+160 Large HQ/+100 Medium HQ/+50 Small HQ), locks Computer Literacy. The Large HQ also has a conference room, a large guild meeting hall and a bar. Also there is an appearance change thingie that costs 50 mil to use.

Large and Medium HQ take 4x4 squares, Small HQ size is 3x3.

Grid House


Computer Literacy: +54

This building enables gridding to the city in the same way as you would grid to your control tower at your notum base (if you have Notum Wars expansion).

It takes 1 square to build. I'd advise you to not build the grid house right next to the controller as you might get aggroed by aliens the moment you're gridding in.

Notum Mining Operations


Nanoskills: +36

This building has no other functions.

It takes 2x2 squares to build. You know you want one.

Notum Silo


Nano Delta: +36
NanoCost: -6%

A nice building to have. The fun part is - this building can be entered, and it is a 0% suppression gas area! Arena fighting, or just sparring - this is where you do it, without the fear of gankers around.

It takes 3x3 squares to build. Nice to have but not a must if you ask me.

Landing Pad


All Vehicle Skills: +54
Map Navigation: +54

Now, you can of course use it to park your Yalmaha - and those new ones are surely precious to show off. But the main advantage of this is - it also gives you a boost to the skills needed for it. If you are running out of space, this would be the first to go in my oppinion. Nice to have, but not necessary.

It takes 2x2 squares to build.

Swimming Pool


Body Dev: +54
Swimming: +54

From the outside, arguably an ugly building, in tune with the Mining Operations and the Notum Silo. The architect of this building was designing bunkers before he turned to city-scaping. But once inside, you will be amazed. This building truely looks awesome!

A large building, taking 3x4 squares. If you are low on space you might consider not building one, then again, it's a must-have if you are a social or RP org.

Satellite Uplink

This building adds no buffs. But you know you want it, cause this tower enables scanning of your surrounding, giving you warning messages when an alien attack will occur. It's only a 5-minute-warning, but more than nothing!

1 square to build - and a must-have!

ECM Tower

This is one of the most important items to have. It lowers the chance of a random, unexpected alien attack, and by turning off the ECM cloak, an alien attack will be triggered within minutes.

It takes 3x3 squares to build. A must-have!

Markets No longer functional. Can't be bought or placed.

As of the 18.5 patch, this building is obsolete. It used to be the place where players could have their own shop terminals to sell items to other players.

Streetwalk Cafe

Pure social - the place to hang out and wait for those aliens to come.

It takes up 2x2 squares.

Sky Bar

Purely social as well - but you will be able to party in the sky.

This one takes 1x2 squares.

Guard House

This building has heavy-armed guards who will hold up the aliens until you can marshall your own troops to defend if need be. Guards are unable to defend a city alone for long, but they can be of great help some times. Be aware that if a guard outdamages you or your team, you will not get the alien experience and won't be able to loot the alien corpse. Most guilds these days choose not to have guards, to avoid any possible accident of a player attacking a guard by mistake.

It takes 1 square to build.


Apart from the grid, there's Wom-Pahs to several of our favourite bars: Reet's, Neuters, Rompah. After fending off the aliens, this is the place to chill out and talk about your heroic deeds. Or something.

They need 1 square. Highly recommended also for fast travel.


After relaxing in this building for a minute, you receive an XP buff called Relaxed State.

Requires 1 square to build.


And if your city doesn't appeal to you yet with all those buildings in it, you can still place trees, statues, lamp posts and benches.

These take mini-squares to build and can be placed on the margins around the buildings.

Guests in your buildings

Yes, you can have friends over at your city! They don't need to be in your org, just team with your guests, enter the building first and then they can enter after you. Good to have a friend use the laboratory, grid out after a raid, relax by the pool or PvP in private if you want. Formerly this required players to have the Alien Invasion Expansion, but not not anymore.

Last updated on 06.04.2023 by Cariadast
Information originally provided by Evilbaffle, Phelsior, Igoros, Egeria, Kzak and Daimoness to the AI Library Forums.
Additional information provided by Windguaerd and Tepamina.
Sauna tradeskill process after the Anarchy Online Wiki, which is not easily available anymore.
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