The Purge, a movie that came out during the year 2013 was a "horror" movie about people killing each other for one day. The setting takes place in the United States during the year 2022, when everything is peaceful and crime is gone. However, for twelve hours, the government allows all crimes to be legal to control the population. The first movie is about a family trying to survive the event, but turns out having problems that leads to the father dying. The sequel to The Purge, The Purge: Anarchy, the second movie that came out during 2014, is about another family surviving the purge.
Although both movies didn't receive the best reviews and ratings, but they were both successful since the first one made over $89 million out of a $3 million budget and the second one over $110 out of $9 million. The directors of this franchise are planning to make a third movie called The Purge: Vengeance supposedly by July, 2016. Here are the trailers for one movie if you are interested.