 Numerous add-on developers for established simulator franchises such as Train Simulator and Microsoft Flight Simulator are based in Germany, with one of the most popular, Aerosoft, being based in North Rhine-Westphalia.First-person shooters have also been traditionally quite popular in recent years, which has become a controversial debate.There has been much discussion about the violent content of first-person shooter games, and as such these games, especially uncut versions, are highly coveted in gaming circles.