well i havn't played it before but after you mad gazzilion threads with it i decided to install it so you can have at least anybody to talk to =P
in any case, the only game i could think of that is itty bit simmilar to immortal is
Clans though it probably wasn't as good. and it is classic diablo like rpg. just the atmosphere was dark as well and it had simmilar maps (as you see on screenshot). and the game basically sucked but well, maybe you'll like