# NetHack--
NetHack-- is a variant of several historic versions of NetHack, and a distant ancestor of SLASH'EM.
Three versions of NetHack-- were released:

NetHack-- 3.0.10 was released in December 1992.  It was briefly called NetHack++, but this led to a lot of silly questions about it being rewritten in C++.  The name was changed NetHack-- to avoid the confusion.
NetHack-- 3.1.2 was released in June 1993 as binary only.  Because NetHack 3.1.3 was released shortly after, no source for NetHack-- 3.1.2 was ever released.
NetHack-- 3.1.3 was released in August 1993.  This was the last version of NetHack--.
Tom Proudfoot, one of the original authors of NetHack-- 3.0.10, combined NetHack-- 3.1.3 with the current version of NetHack Plus.  The result was SLASH, which with the addition of the Wizard Patch became SLASH'EM.