The Frag Grenades work a bit better and damage the walls, and your team, if you are not clear. Fragments can even fall from the sky if it explodes up there. The first mission has you in a torn up Kosovo, early evening, in the rain. You have to rescue some UN hostages from a group of terrorists that will not hesitate to shoot you or the hostages. The lighting is drab, the rain makes for a grey tone to the air, and your team moves with stealth and care and fluidity.
Shadows play across their outfits and little puffs of breath waft up as they go.
All of this makes for an eerie and gloomy atmosphere which is just what you need. If I keep coming back to the AI, it is because I found it to be the strongest point in this game. I just can't seem to stress enough how much the Tangos are like humans. They will call out for help if they see you or are wounded. Instead of the help just charging in, they will sweep from the sides, retreat and take cover or set up elaborate ambushes.