Server

A Server is a computer system that is accessed by other computers. In The World all Dungeons, fields, Monsters, and treasure, namely every part of the game is stored on one of the games servers. At the center of each server is a Root Town, where players gather to form parties, buy, sell, and trade items, raise Grunties, and do pretty much everything that doesn't involve fields or dungeons. Fields and other servers can be accessed from the root town through the use of the Chaos Gate, usually located in a central location of the town, by using a combination of key words.

The World's Servers
There are numerous servers in The World, they include:
 * Δ Delta Server, with Root Town Mac Anu
 * Θ Theta Server, with Root Town Dun Loireag
 * Λ Lambda Server, with Root Town Carmina Gadelica
 * Σ Sigma Server, with Root Town Fort Ouph
 * Ω Omega Server, with Root Town Lia Fail
 * Naval Monte, a Root Town made an appearance in Legend of the Twilight for one summer only but its server name is unknown.

Net Slum
Though technically not a true server, Net Slum exists as a gathering point for hackers and Vagrant AIs. For a short period it also took the place of Omega Server's Root Town Lia Fail. In .hack//Unison, Lios offered Helba to turn Net Slum into a Root Town but Helba declined. Analysis indicates that it did become a Root Town later on.

The World R:2's Servers

 * Δ Delta Server, with Root Town Mac Anu
 * Θ Theta Server, with Root Town Dol Dona
 * Ω Omega Server, with Root Town Lumina Cloth
 * Σ Sigma Server, with Root Town Breg Epona

AIDA Server
After a Helen-type AIDA steals Atoli's Epitaph, the AIDA are able to construct a mirror server containing most of The World's data. The AIDA server contains all the Root Towns and system files of the official CC servers, but is only a replica, and as such there are tiny flaws scattered throughout it. Moon Tree's @Home also acted as an AIDA server when Sakaki took it over. Players PKed in the @Home during the incident became temporary Lost Ones, returning when the server was disabled.

Net Slum Tartarga
Like Net Slum, Net Slum Tartarga is not technically a true server, but it is used during the battle with Cubia as a stable base of operations when the other Roots Towns become dangerous to access. Net Slum Tartarga's Chaos Gate can access all the areas accessible from the other towns.