Unique items

There are four Unique items in NetHack:

• The Candelabrum of Invocation
• The Silver Bell
• The Book of the Dead
• The Amulet of Yendor

Artifacts are not unique items, as they are a normal type of item with a special name. For example, the Eye of the Aethiopica is simply a named amulet of ESP.

Stormbringer and the Tsurugi of Muramasa are the only runeswords and tsurugis, respectively, in the game, but neither count as unique items, since it is possible to find non-artifact runeswords and tsurugis in a bones file, or wishing for them, while already having their artifact equivalent.