[FeministHacker]

What I find interesting is the ultimate heratage of MineCraft:

If I recall correctly, Wurm Online directly owes it's existance to RuneScape, a Fantasy MMO with skills instead of classes, and a strong crafting system. RuneScape started originally as a project to recreate Utima Online in java.Ultima Online has a crafting system, player housing, skills instead of classes, and is the second-oldest MMO, and the first that most people would recognise as such.

Ultima Online is closer to a MUSH or MOO, unlike most modern MMORPGS. On the whole they follow a similar style of game as designed in DikuMUD, one of the most popular MUD engines.

As far as I am aware, there are few major competitors to Ulima Online and RuneScape. The DikuMUD model of classes and limited interaction with the world is far similar to develop and market (see World of Warcraft et al). Yet MineCraft's appeal clearly shows there is a huge demand for something else.