Simulators used to present airports for pilots to practice approaches and landings, and sim makes bragged about how many airports were covered. Not so for helicopter training anymore. Companies from CAE to Frasca are focused on mission training. Operators who fly EMS, offshore or law enforcement have widely disparate missions, and approaches and landings to airports are not especially relevant for their pilots.
The sim makers have developed visual scenes keyed to an accident scene or oil platform or urban incident with crowd control scenarios. One or two pilots can train in the environments they'll be flying in daily, complete with variable weather. CAE's mission trainer even introduces random movements by personnel aboard oil rigs and in crowds in an urban environment.