A while ago I discovered a version of NetHack which uses isometric tiles and an optional custom GUI called
NetHack 2000:
![Image](http://www.mobygames.com/images/shots/l/887535-nethack-2000-windows-screenshot-some-treasure-in-a-small-room.png)
This version was actually developed in Japan based on JNetHack (here's the
old official website from 2001), and I think it uses tiles created by a Japanese artist,
Mitsuhiro Itakura. More recent releases of this
NetHack variant added sound effects and limited animation.
I like this kind of art style, and Itakura's 32x32 tiles can be still used, albeit in top-down view, in modern versions of NetHack. However, the isometric tiles (some sources call it "cavalier perspective" IIRC) appear to be used only in certain variants of
NetHack like
GTK+ NetHack or
glHack, as well as
Slash'EM.
The Wayback Machine has preserved only one version of
NetHack 2000,
Alpha 0.2.0.0, which is built upon
NetHack 3.2. There was a later release v0.3.1.1 (based on NetHack 3.3.1), as suggested by the archived page, but the binaries of the English version have not been preserved. Ali Harlow's website still has the source
here, so this version could theoretically be re-built. There are also several Japanese versions found
here, including later
NetHack 2000+5 and
NetHack 2000+8 builds, as well as another isometric tile set in a completely different art style (as shown
here for example).
What makes me wonder is that this type of isometric tileset seems to be overlooked (at least, outside of Japan apparently) somehow, as I have found very scarce information about
NetHack 2000 at non-Japanese websites with the exception of Ali Harlow's pages. AFAIK vanilla NetHack does not by default support isometric tiles, so there is no direct counterpart to these variants for people who do not know Japanese.