YorMUSH is a MUSH founded on the simple idea floated around one day:
throw a bunch of characters into a world with no infrastructure, and
what would they do? It is in many ways a deconstruction of the
typical hero, as the skills of the usual heroic character are not
nearly as useful without players getting more creative and drawing 
upon a more varied background.

The game uses an inbuilt Rating system to help keep adult activities 
from interfering with more general RP. It is a crossworlds MUSH 
allowing both original creations and media characters(mostly from 
anime), with a confirmation process to categorize canonicity.

Initial access to materials and equipment is limited, but can be 
expanded through the activities of the community as a group effort. 
Eventually the goal is to have a functional, player-run town or two 
with an organized attempt to explore more of the world, when the MUSH 
will move on to Phase Two.

This is a fairly experimental project for the admins, so there may be 
some adjustment and new code is still added frequently. The current 
incarnation is playable and open to new players, however.