There is a [[test server]] which is allows testing of new game content.
[[Astrology:Valrei|Valrei]], a moon of Wurm, has a special "server only" (no client, so we cannot go there) which simulates battles between the gods. (See [[Scenarios]] for more information.)
Finally there is a login server which is part of the infrastructure used to manage accounts. If the logon server is down, no accounts can logon to any of the other servers.