Yeah, that game will put you on the edge of your seat.
The game experience is like the tracker scene in Aliens, where the space marines see the images on the unit and the thumping increases as the enemies get closer and closer. The catch is, though, that you cannot see the enemies when they are in front of you. You have to know where they are by using the tracker, and the only way that they will become visible, is when your gunfire makes contact with them.