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General information

Duality is a semi-public test server for EVE Online that is used by both CCP developers and EVE players to test changes and new features before they are released to the Tranquility server. Test servers have a very strict set of rules.

Duality differs from Singularity in that it is an event server, meaning that it is focused on organized events like mass tests and playtests coordinated by CCP. Only during this events is Duality available to players, the rest of the time it will be in VIP mode and only CCP developers and ISD BH volunteers will be able to access it.

Its primary function is to provide a test environment as close as possible to the live environment of Tranquility. For this purpose, the Tranquility database is "mirrored" (copied) over to the Singularity server once every few months (or more often, if needed by the CCP Quality Assurance department).

Hint: Please keep in mind that most new features on the server are still in development and not set in stone. They will most likely be changed and tweaked further. If you find bugs please report them. If you have more feedback please post it in the Test Server Feedback Forum.

Accessing Duality

In order to access the Duality server you need to have an active account on Tranquility. The account needs to have been active at the time when the current mirror was taken, this date is usually mentioned in the Test Server Feedback forum.

New Launcher

With the new launcher (for both Windows and Mac) it is very easy to connect to Duality. Just select "Duality" in the server drop-down menu and then login with your account. Everything else (creating and patching of the client) is done by the launcher. For the case that the Duality option is grayed out - check the launcher settings (tab "Test Servers).

Old Launcher

You have two options, if you are still using the old launcher:

  • Switch to the new launcher
  • Follow the instructions below

Windows: Duality Client Installation

Follow these steps to create a new Duality client:

  1. Create a separate folder for your test client ( i.e "C:\eve\duality")
  2. Copy everything from your original EVE folder (by default located at "C:\Program Files\CCP" ) to the new ("C:\eve\duality").
    This step is important, since patching the test client will render it incompatible with the Tranquility server.
  3. Create a shortcut for the new eve.exe file inside C:\eve\duality
  4. Right click on the shortcut and select properties, then select the shortcut tab
  5. Add /server:Duality and press OK (Make sure to add a space before the backslash)
    The final look of the Target line would look something like this:
    "C:\eve\duality\eve.exe" /server:Duality
  6. Then double click on the shortcut
    The EVE launcher will start and patch your client if necessary
  7. Press "Play" to start the client and log in

Mac: Duality Client Installation

  1. Download the Tranquility client: http://www.eveonline.com/download/ (If you have already installed the EVE Client, skip to step 3 )
  2. Install the Tranquility client
  3. Rename your install to "EVE Online TQ" or something of your choice
    • Using Finder go to Applications > EVE Online > More Info OR Applications > EVE Online (right click) Get Info
    • In the Name & Extensions Tab, enter the name of your choice. Example: EVE Online Tranquility.app
  4. Install another copy of EVE Online (download the client here http://www.eveonline.com/download/)
  5. Rename that to "EVE Online Duality" or something of your choice
    • Using Finder go to Applications > EVE Online > More Info OR Applications > EVE Online (right click) Get Info
    • In the Name & Extensions Tab, enter the name of your choice. Example: EVE Online Duality.app
  6. Open a Terminal window
    • easiest way to do this is to use Spotlight (cmd + space) and type terminal into the search field
  7. In the Terminal window type 'open', then drag and drop your Duality client into it and add ' --args /server:'
    • should look similar to this: "open /Applications/EVE Duality.app --args /server:"
Hint: The /server option is being ignored for the Mac client, when the EVE launcher updates itself to a new version. Workaround: Close the launcher / client and start it again.

Getting help

The petition system is unavailable on Duality and Game Masters will not be able to address issues related to Duality.


There is an ingame channel named Duality where players on the event test server exchange information. You may also find volunteers and developers there.


For several issues it is also a good idea to check the Test Server Feedback Forum. There you can also discuss new changes on the test server or possible problems.

Technical details

The setup of Duality is similar to Tranquility or Singularity, but with lower numbers and with most machines being virtualized.


The Duality server is an event server, which means that it will be open to players only during the course of events organized by CCP. The rest of the time it will be in VIP mode and only accessible by CCP developers and ISD BH volunteers.


The process of "mirroring" consists of taking an exact copy of the Tranquility database, including character and account data, like a snapshot. This copy is then processed by the CCP Deployment team and all starbases are removed, in order to prevent players from spying on their positions and then using this information on the live server. All moon minerals are available in all moons, to help testing and prevent moon scouting on the test server. All accounts are edited so they don't expire. Agent memory (both standing and loyalty points) are removed. S&I jobs are removed (because jobs in starbases would get stuck). The market is seeded so that all market items cost 100 ISK and are in plentiful supply. At least one station per constellation is market seeded like this. In addition there are some other internal adjustments. This entire process can take several days.

After a mirroring process, the Tranquility and Duality databases are separate and distinct and no synchronization between them will occur until the next mirror is taken from Tranquility and deployed on Duality. Character progression on Duality will be independent of Tranquility - players can effectively train two different sets of skills on the same character, if they so wish. Actions taken on the Duality server will not affect your account or character on the Tranquility server.

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