I was assigned to kill an NSF leader on a plane in LaGuardia National Airport, but Paul has been urging me to side with the NSF. My murderous nano-aug superior is insisting that if I don't kill the guy, SHE will do so. It felt like a serious breaking point with major plot ramifications.
On my first attempt, I died horribly.
On my second attempt, I was able to kill Anna Navarre, and the NSF leader actually survived! I'd gone so far as to booby trap the plane with land mines, though, and I inadvertently set one off before I could talk to the guy.
On all my subsequent attempts, Anna either killed the guy before I can kill her, or she wound up killing me herself. I finally gave up and just resumed playing from a file where both of them died in the altercation.
Does the NSF leader have anything more to tell you if you save him from Anna? Does Gunther wind up killing him? What would have happened if I'd followed my superiors' orders and either killed him outright or let Anna kill him?
Best Answer
If you kill Lebedev
If you kill Navarre
If you don't kill neither Lebedev or Navarre - Ana kills Lebedev
Other soldiers at Unatco and general Carter will provide their comments based on your decision. Gen Carter will support your decision about not killing Lebedev (even if Ana kills him), he will be compassionate if you actually killed him, saying it must have been difficult.
In the end, Killing Navarre is the most advantageous choice - you get the most Xp and get rid of her early on. However, it is an extreme scenario in which you also loose some interaction with Navarre later on when you need to face her again and fight.
Not killing Lebedev seems the most logical, reasonable choice as it shows JC hesitant to finding his brother working for the terrorists and refusing to kill an unarmed prisoner.
Killing Lebedev is the least advantageous option as the player doens't receive any xp points. I find that very disappointing because it shows the game developers are "interfering" with your choices and punishing a player that chose to follow a difficult but direct order from his superiors. As much as I love Deus Ex, I found this quite dissatisfying that you're being "forced" to choose save or not kill Lebedev simply because those choices are more favorable.