Leon: Right when you step out of the subway and have to make your way through some streets. Especially when you take your first couple steps and a car just rams into a pole right in front of you, and people ditch and run for their lives. The utter chaos of it all was amazing, made even better by the protagonist's helplessness to do anything about it.When I was experiencing it, I was like "THIS, this is what the zombie apocalypse should feel like, what Resident Evil should feel like."
Chris: When you first start the campaign and walk out of the first building, only to have a camera right in your face and a reporter asking you questions. Then you walk up the street to find locals fleeing, and BSAA troops already engaged in battle against some enemy. I like how this gave context to how the world sees the BSAA, there should be more scenes like this where you interact with all kinds of different parties, because if we go too long just running and shooting, running and shooting, only seeing J'avo fighting BSAA the whole time, we forget that the rest of the world is even there, how the conflict affects them, and why we are fighting in the first place. It would have been awesome if maybe we had a scene with some dialogue between the local military or police force and the BSAA, perhaps one looks down upon the other, or maybe a local armed force would try to boss around the BSAA because they are in their territory, or maybe the BSAA would try to exert superiority over a local force because this is a threat they are specifically trained to deal with. What if the BSAA knocked down a door to find a small hold up of armed civilians that had been holding out against J'avo- that would be awesome, maybe the civilians wouldn't trust the BSAA and a shootout would incur, or maybe the two would have to join together to punch a hole through the J'avo and escape.
Jake: When you first wake up in the Chinese research facility and you have to melee your way out. Everything was stark white with a few highlighted places where you could use the environment to escape, it gave me kind of a Mirror's Edge feel. Using the security cameras to kill some J'avo and find the password to the door was also a nice touch, it was like one of the classic puzzles from the old games.
Ada: When you first enter the sub and you get to sneak around Splinter Cell style and pull off some sweet assassinations. I think that really exemplified the role and personality of Ada in this game.