Railway Car siege bug

[xiadz]

I killed all of the zombies that were coming in the siege and i can't progress through. Like I don't see ANYONE on the map. This is a real ♥♥♥♥♥♥♥♥, I will not play this crappy mission again, fix this devs, you got a BIIIG MINUS

[freezingcathedral]

chapter 1-3: labyrinth of death;
at the end of the by the blocked door (glowing symbol), facing the direction of the blocked door from the ground, look left on a rooftop and take out the sniper.

chapter 3-2: freight train of fear;
restart from the checkpoint of the elevator, kill them slowly.
if you kill them too fast the game will glitch and not trigger the next phase.
(not sure if this is the real cause but i've never found a reason other than this to be the culprit.)

[HiTmAn]

on left side u will see like curch.. on roor u will see one guy with sniper he dont shot that why is hard to spot him once u kill him door will open