If you didn't notice the year this takes place (1985) due to the cars and clothes, you'd probably think this was a film from around 1970-74, and likely a European Giallo thriller, but it isn't one because it's 1985 and set in and around San Francisco. However, it owes much to the influences of Argento and the other Italian and European directors of this particular type of horror film, called the "yellow" (Giallo) cinema. These really are films of terror, not horror, and they are typically slow-paced and languid, with a minimal music track that doesn't get in the way, a normal human killer (normal meaning non-supernatural) with definitely twisted psychological motivations or obsessions. The actors are also minimal, with only limited numbers of characters, and they are often well-rounded character actors who rise to the occasion to put in above average performances. These films also have rather grisly killings with a fair amount of gore. This particular film meets all of these standards, with the exception being that it is only moderately gory. As has been said in other comments, if you are a fan of the gory modern fast-paced horror films with flat stereotypical characters, you might be bored by TORMENT, but if you like nicely done, plot-driven Giallo terror thrillers, this will not be wasted time for you.
