SLASHER FILM RULES - Peeping Tom (1960)

Films have formulas and rules, but how well do films follow those formulas?  Are the slasher film rules true?

Peeping Tom (1960) is a serial killer film, called by some a precursor to slasher films, but does it follow the slasher film rules?

SLASHER FILM RULES - And Then There Were None (1945)

Films have formulas and rules, but how well do films follow those formulas?  Are the slasher film rules true?

And Then There Were None (1981) is a murder mystery (based on the Agatha Christie novel) but as a film where people get killed off one-by-one, does it follow the slasher film rules?

SLASHER FILM RULES - The Rules [2]

Film genres have formulas and rules, but how well do films follow those formulas?

Like the killer from the a Slasher Film the Slasher Film Rules aren't as dead as people thought... and has returned to kill again (not that it killed anyone the first time, the deaths the first were just a coincidence.)  Once again, these are Horror Film Rules or Slasher Film Rules films that Slasher films follower and that a lot of horror films do. These are rules about films in which a small group are killed off one-by-one and who (if anyone) will survive.