A module for ToME that tries to get even closer to Tolkien roots. Not strictly canonical or chronologically accurate by any stretch of imagination; like ToME, it combines Ages and personalities and stories, and introduces some `ideas' - for example, what happened to the Ithryn Luin and Elenwe, who is Tom Bombadil, and other points of contention in canon.
Theme introduces a completely new and more dangerous wilderness map, over 200 new monsters (plus over 60 uniques), no Zangband or Cthangband monsters (activating those options does nothing), many new artifacts, objects, and ego items, new character races, subraces, and subclasses, as well as changes to some existing races and classes.
You can look through Theme characters on the Angband Ladder - thanks to DarkGod and Pav for making it possible. :)
Please be aware that this entire site is rife with spoilers for ToME and Theme alike.