Among the first games, if not the first, to have fully dynamic/real-time shadows.
Also among the first ones (not the first one, mind) where you can chop off limbs from your enemies and they continue to live and fight you, until they bleed to death. (IIRC, organic mobs did bleed, undead didn't.. long time since I last played)
About Severance - Blade of Darkness
2008-04-17 (updated 2009-04-28) #