The Colonel's Bequest
In one of Sierra's more creative copy-protection schemes, The Colonel's Bequest came with a red-lined foldout with "fingerprints" of characters in the game. Using a special red-gel "magnifying glass," you would identify these fingerprints for entry before being allowed to start the game.
In the sequence in Fifi's room while she get ready to meet her lover-boy Jeeves, when she goes behind the screen to change type in "Open Door" and you can see Fifi in her underwear.
Laura Bow, the heroine, was modeled after Clara Bow, a well-known actress from the 1920's.
Once Laura is in the washroom, type in "Take Shower". Laura strips, gets in and scrubs away while the hooded killer slips in and murders her in a parody of the horror classic Psycho, complete with high-pitched violins playing.
Information also contributed by Itay Shahar and uclafalcon
Trivia contributed by Trixter, Patrick Bregger, Nate Ridley.