I dont played this game but what I hear it was really ambitious and dark-themed game with 5 unique factions I wanna play, the version from windows 98 is available on internet but ther is problem to run this. maybe GoG gonna help?
EDIT
I was able to find the DOS version and play it. The game is challenging with a unique gameplay mechanic, and I was consumed for a few days. We meet Vampires that collect blood for greater power, an animalistic nation where units can combine to create stronger breeds and a crazy dark themed circus full of psychopaths!