THE FAMILY TREE OF NETHACK
==========================


  Hack
  Jay Fenlason e.a.
     |     \
     |      \
     |       \
     |    Hack 1.0.1, 1.0.2, 1.0.3
     |    Andries Brouwer
     |         |
     |         |
     |         |
     |    PC Hack 1.01e, ..., 3.6
     |    Don G. Kneller
     |       /
     |      /
     |     /
 NetHack 1.4, 2.2, 2.3
 Mike Stephenson e.a.
     |
     |
     |
 NetHack 3.0
 Dev Team
     |\______________________________________
     |                                       \
     |                                   NetHack++
     |                                 Tom Proudfoot
     |                                  & Yuval Oren
     |                                       |
     |                                   NetHack--
     |                                   (rename)
 NetHack 3.1                                 |
 Dev Team                                    |
     |\__________________________            |
     |       \                   \           |
     |   NetHack: The        NetHack Plus    |
     |  Next Generation      Stephen White   |
     |  Sebastian Klein          .\_________ |
     |                          .           \|
     | .........................           Slash
     |.                                Tom Proudfoot
 NetHack 3.2                                    \
 Dev Team                                        \
     |\__________________________________________ \
     |     \                   \                 \ \
     | Dwarf patch             Wizard Patch      Slash 4.1.2
     | Osku Salerma       Larry Stewart-Zerba    Enrico Horn
     |       \             & Warwick Allison          |
     |        \                     \_______________  |
     |         \____________________________________\ |
     |                                               \|
     |                                           Slash'em
     |                                        Warren Cheung
     |                                        & Kevin Hugo
     |                                           .
     |                                          .
     |  ........................................
     | .
 NetHack 3.3
 Dev Team

Not in this diagram are the following patches:
The Boulder Patch for NetHack 3.2.2, written by D. Stage.
The Cow Patch for NetHack 3.2.2, by Scott D. Hammack.

Thanks to Kevin Hugo for his article on rec.games.roguelike.nethack.