It’s quite rare for a movie to be banned by a single country, let alone a number of them, but sometimes a director will release a piece of work so violent or disturbing that the relevant authorities need to step in.
These are movies that are not suitable for the whole family and were often banned for a number of different factors, but the main focus is almost always violence, although animal cruelty is a good way of getting banned for a long time, depending on the country. These are the films that were so over the top that they were ultimately banned either forever or for a few years.