by ~DJ~ » Thu Nov 04, 10 5:19 pm
As I've mentioned, I think it's on Shifter mod. (or it's mod-extension, BIOMOD)
What it did was it gave you a penalty for killing allies. So I'm sure it's not a trigger, instead, it's coded on the player.
Trigger would be easy to make, however, since you mentioned that you want to put penalties for killing certain friendlies or letting them die, It'll require a bit advance coding, you'll need your own custom playerclass. I hope you have one since you have a big project. Otherwise you need a good coder which can help you around your mod.
Good luck, by the way.