I haven't thought about Realmz in a long-ass time. It had some really crazy tracks and was the only game I know of that used MOD instead of MIDI for its music.
Also while trying to get my facts straight (All I remember was trying to find a mod player to play the deus ex music found on the cd) apparently Unreal tournament and tyrian2000 used mod music as well, Someone at Epic Megagames must have liked them.
By the way if you liked the Deus Ex soundtrack you can check out the Sonic Augmentation ocremix album. Really good.