Lists by tharrx
Though the packages were padded with non-horror thrillers like Danger Woman and the Man Who Cried Wolf, a number of films from 1931 to 1946 (the years covered by the Shock packages) were not included.
Not all of these films are pure horror films, but most would have been more welcome late night viewing than Chinatown Squad or Reported Missing.
Some of the films were probably considered to "classy" to be part of the package. Some might have already been released on another package. Some might have been missing, overlooked, or lacking a decent print.
In any case, here are some notable Universal films that were not released as part of the Shock packages.
NOTE: This list doesn't include any of the many Paramount films (like Island of Lost Souls or The Monster and the Girl) which MCA purchased in 1958. None were ever included in a Shock film package, possibly because MCA did not take over Universal until 1962.
The list also does not include films that Universal lost the rights to, like The Old Dark House and Life Returns.
This means it contains some movies that are lost, some movies that Universal no longer owns, and some movies (mostly Paramount) that it did not produce but has since acquired.
It also contains some films whose status as horror (or the other above mentioned genres and sub-genres) is questionable, or even doubtful, all in the name of thoroughness.
I hope to continue to update this list, adding new entries and describing the status of the more obscure ones listed.