The Hell Let Loose series is not that at all. HQI feel it's worth making that point evidently clear from the outset because Hell Let Loose: Vietnam - a dedicated sequel trading the World War II theatre of war for the Vietnam War - can be quite a challenging game to understand and play. Where Hell Let Loose: Vietnam changes the dynamic is in the form of its asymmetrical warfare. It's from this point where you will figure out if Hell Let Loose: Vietnam is in fact a game for you. Simply put, Hell Let Loose: Vietnam is a complicated and rather hardcore shooter experience.