The Jargon File (version 4.4.7, 29 Dec 2003):

Angband
 n., /ang'band/

    Like nethack, moria, and rogue, one of the large freely distributed
    Dungeons-and-Dragons-like simulation games, available for a wide range of
    machines and operating systems. The name is from Tolkien's Pits of Angband
    (compare elder days, elvish). Has been described as ?Moria on steroids?
    ; but, unlike Moria, many aspects of the game are customizable. This leads
    many hackers and would-be hackers into fooling with these instead of doing
    productive work. There are many Angband variants, of which the most
    notorious is probably the rather whimsical Zangband. In this game, when a
    key that does not correspond to a command is pressed, the game will display
    ?Type ? for help? 50% of the time. The other 50% of the time, random error
    messages including ?An error has occurred because an error of type 42 has
    occurred? and ?Windows 95 uninstalled successfully? will be displayed.
    Zangband also allows the player to kill Santa Claus (who has some really
    good stuff, but also has a lot of friends), ?Bull Gates?, and Barney the
    Dinosaur (but be watchful; Barney has a nasty case of halitosis). There is
    an official angband home page at http://thangorodrim.angband.org/ and a
    zangband one at http://www.zangband.org/. See also Random Number God.