My Top 10 Most Underrated Horror Movies

Keep in mind, even though I have seen almost 500 horror movies, I haven't seen everything that exists.
Let me know what your Most Underrated Horror Movie of all time is.
SPOILERS
Movies (In order):
Mother's Day (2010)
Paranormal Activity 4
Child's Play 3
Hostel
It Chapter Two
Devil
The Purge: Election Year
JeruZalem
Saw II
Halloween Kills
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