I would guess it ranks your performance and then gives you the appropriate rewards for how well you did. Seems like completion time is one criteria, maybe number of deaths is another. When I did it I finished in 17:31, I think it was, only one of my teammates died once, and I got all three rewards. I'll have to ask the person who died and see if they got all three as well.
I think I'm going to like this system a lot more than the bonus objectives in Prophecies. It looks like it directly rewards skill in that the better you do, the more rewards you get. Plus, the gold rewards are nice; they payed for most of my next set of armor in the outpost after the mission. ^_^
|