"Few horror sub-genres are as divisive as exorcism movies. For some, they are silly to the point of high camp, outrageous stories about invisible creatures that can take control of normal people and make them do outrageous things. For others, exorcism movies reveal a hidden realm of evil that has a very real impact on our world.
That tension allows a wide variety of approaches within the sub-genre, despite the dominance of one monumental film from the 70s. Exorcism movies can be ridiculous crowd-pleasers, stately dramas, or lowbrow comedies. Whether it's because of the power of Christ or a really good script, you should feel compelled to watch these great exorcism movies."