Texas Chainsaw Massacre (Wizard Video; Atari; 1982)
How can you make a bad game where you play as Leatherface and chop up teens? See this game...
Believe it or not I played this game (on a ROM) and boy does it suck. These graphics are bad even for Atari standards.
Check out Angry Video Game Nerd's hilarious review:
Halloween (Wizard Video; Atari; 1983)
Much better than TCM, which is not hard to be. Another I tried via ROM. They even kept Carpenter's original score but it gets annoying after some time.
Another AVGN funny review:
Frankenstein's Monster (Atari)
Not technically based on a horror film, but close enough. Another played via ROM. Fun but very repetitive.