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Check it out
here, and then –
here. I understand that finding an answer in a thread with over 500 pages can be difficult (see the section header), but it seems like finding the FAQ shouldn't be too hard.
Temyy_Ildar, kill them if they run away. In multiplayer maps, there are no scripted dialogues to "do evil deeds" or "perform good deeds," so you get more points for monsters. If they don't run away, you won't receive any points. And both in campaigns and in multiplayer, you can earn Blood or Tears points in libraries or arenas.