PlaneShift is a cross-platform fantasy MMORPG in development.
The Death Realm
Unlike many other MMORPGs on the Internet, when a character dies he/she is transported into the Death Realm. It consists of a large maze that the player must navigate. It is full of annoyances like dead-ends, and how the majority of the maze is suspended high off the ground making falling off punishable by starting over.
This is the wikipedia article which explains in more detail the mmorpg: