Texas Chainsaw Massacre was 1974 (filmed in '73), and Halloween 1978.
The second Texas Chainsaw Massacre was released in 1986.
Friday the 13th, the first one, was filmed in 1979, released in 1980.
Stephen King once said (and this was in one of his non fiction books in the late Seventies) that it would be very irresponsible to show a minor the Texas Chainsaw Massacre, because it would likely damage that kid's mind forever.
