The Manster ratings (Movie, 1959)

An American reporter in Japan is sent to interview an eccentric Japanese scientist working on bizarre experiments in his mountain laboratory. When the doctor realizes that the hapless correspondent is the perfect subject for his next experiment, he drugs the unfortunate man and injects him with a serum that gradually transforms him into a hideous, two-headed monster.

The Blob
Total votes: 32,090
Average rating: 6.3 13 Ghosts
Total votes: 8,251
Average rating: 6.1 The Bat
Total votes: 7,014
Average rating: 6.1 It! The Terror from Beyond Space
Total votes: 6,901
Average rating: 6.0 The Abominable Snowman
Total votes: 5,649
Average rating: 6.4 Fiend Without a Face
Total votes: 5,280
Average rating: 6.1 The Brain That Wouldn't Die
Total votes: 8,103
Average rating: 4.6 The Crawling Eye
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Average rating: 5.3 The Two Faces of Dr. Jekyll
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Average rating: 6.3 The Creature Walks Among Us
Total votes: 4,706
Average rating: 5.6