There were four parts to the Purge. I only saw the first three.
Very weird and surreal. But I like ‘em.
If you wanna hear what the siren tone sounds like, go to Youtube and type “The Purge Alarm Sound” in the search box. It’s about 1 minute long. There’s some narration too The concluding siren is almost worse than the opening siren.
There is a very good underlying story concept in the Purge movies. Most unfortunate is the poor acting, production value, and catering to the pc section of society.