____________________________________DikuMUD_________________________ 
   |         |         |         |         |         |         |        |
 Vie1      Silly    Pirate    Circle1   Diku_II   Sequent   Techno   Crimson
   |         |                   |                   |   
 Vie2     DaleMUD       ______Circle2______       Copper1
   |                   |         |         |         |
 Vie3             Archipelago Circle3  LostLands  Copper2____________
   |                                                 |               |
 Vie4                             _________________Merc1_______   Copper3
   |                             |                   |         |
 Vie5                         Rom1.0                 |        Vego
                                 :_________________Merc2________________
                                 |         |         |         |        |
           ___________________Rom2.3   TheIsles    Envy1     SMAUG     ACK
          |         |            |      (NiMUD)      |
       Sunder   EmberMUD   ___Rom2.4___           _Envy2_
                          |      |     |         |       |
                      Anatolia Wurm Oblivion  Mythran   EOS