+== Earlier non-influences ==
+
+There is record of one earlier dungeon-crawling game called "dnd",
+written in 1974-75 on the PLATO system at University of Illinois
+<<DND>>. This was in some ways similar to later roguelike games but
+not to Adventure. The designers of later roguelikes frequently site
+Adventure as an influence, but not dnd; like PLATO itself, dnd seems
+not to have become known outside of its own user community until
+rediscovered by computer historians many years after Adventure
+shipped.
+
+There was also Hunt The Wumpus <<WUMPUS>>, written by Gregory Yob in
+1972. There is no evidence that Yob's original (circulated
+in BASIC among microcomputer enthusiasts) was known to the ARPANET-
+and minicomputer-centered culture Crowther and Woods were part of
+until well after Adventure was written.
+
+(I was a developer of the Nethack roguelike early in that game's
+history; we knew of Hunt The Wumpus then from its early Unix port, but
+it didn't influence us either, nor in any apparent way the designers
+of other early roguelikes. After my time the wumpus was included as a
+monster in Nethack, but this was done in a spirit of conscious
+museumization after historians rediscovered Yob's game.)
+
+Neither of these games used an attempt at a natural-language parser
+even as primitive as Adventure's.
+