Why does this game keep changing?

Q: Why does this game keep changing?

A mud in general, and MUME in particular, has to be a living organism in 
constant development or it will die abruptly. We attempt to code an engine 
and modelise a world whose mechanisms are always closer to those of the 
virtual reality we want our players to live in. Said shortly, we hope that 
our successive iterations of MUME are asymptotic towards the perfect 
simulation of Tolkien's Middle Earth ;-)