The scariest noises in Hell Let Loose: Vietnam are the quietest. The dry-rattle of gunfire is too constant, and helicopters' telltale thwup-thwup gives plenty of warning before dropping fresh troops. Maps are big, so sound is one of the best tools for gauging the flow and geography of a match. When the fighting isn't as loud – if you're separated from the capture point or creeping through the jungle behind enemy lines – rustling leaves and snapping twigs may as well be fireworks.
My reaction speeds are slow, so when that crunch is a half-second warning, I'm often the first to die. But that's a fair price to pay for atmosphere. The best FPS games don't underestimate immersion: Marathon sparked my imagination earlier this year, and now Hell Let Loose: Vietnam is doing the same; pairing Battlefield-style 50v50 matches with gritty realism and more emphasis on teamwork.