+2
Well, hoping they go back to the "Honour" thing in this new movie...
A Predator comes to Earth, or in the case of Predators (Predator 3), they transport people to that Game Planet... they only kill something if it is armed and can fight back.
They never kill an unarmed opponent as it's "No sport" (Arnie's line).
Like in Pred2, the people on the train are slaughtered. Harrigan's Chief says it "Doesn't make sense" about how many people were killed and Harrigan replies "They were all armed".
In Pred2 as well, the boy in the graveyard has a toy Uzi. The Pred scans it and realises it's a fake gun, and doesn't kill the kid.
AvP2, the Predator only kills people who are armed.
In the first AvP though, the start sequence in the year 1904, the Preds kill unarmed people. And in the year 2004, after the team have gone underground, the Preds then arrive and kill the guys who are still at the surface.
Now, a couple of them put up a fight, but the Preds initially attacked them without provocation. Then, after that last guy falls into the hole, he's lying at the bottom, unarmed and injured... and the Pred just wantonly kills him.
Then, when Alexa (Sanaa Lathan) realises the Preds want their weaponry back, she seeks out the Predator... and immediately upon seeing her the Pred goes to attack her and she has to say "wait!" and reveals to the Predator that she has his laser-gun, only then does the Pred make a temporary alliance with her. She was an unarmed opponent and the Pred was still going to kill her.
The first AvP gets it totally wrong on all fronts.
I seriously hope "The Predator" will return to an honour system.