Warhammer 40,000: Dawn of War II

Starting with mission 3 you get a rating when each mission ends. The top one is the Fury rating and it's a measure of how many of all the enemies on the map that you kill. to get a 5 star you simply need to visit the whole map and kill any enemy you encounter and try to avoid that they flee out of the scene. You don't need the full 100%, anything above 90% is most likely a 5 star.