100 Tears is an American independent slasher movie that portrays Austrian-American actor and screenwriter Jack Amos in his career-best performance, playing the monstrous character of Gurdy the Clown with horrific gusto. Released in 2007, this dark film was expertly directed by Marcus Koch, a notable figure in the modern cult horror landscape, with a remarkable screenplay by Joe Davison. The lead cast features Georgia Chris, Joe Davison himself, Raine Brown, and Jack Amos.

The movie falls under the 'splatter' subgenre of horror and employs a unique blend of suspense, guts, and gore, which significantly heightens its grim atmosphere. Its relentless pursuit of raw on-screen terror contributes to its placement among the darker entries in the horror genre.

The plot focuses on Mark Webb (played by Joe Davison) and Jennifer Stevenson (portrayed by Georgia Chris). Webb and Stevenson are two daring investigative journalists who get embroiled in the dangerous pursuit of a vicious serial killer. This sinister figure hauntingly dons the very image of a circus clown, fondly and ominously referred to as Gurdy. The character is terrifyingly enacted by Jack Amos, who pays great attention to detail in order to present the terrifying features encompassing Gurdy, an embodiment of pure terror.

Raine Brown's portrayal of Christine Greaston, a woman plagued by her traumatic past, is compelling, accentuating the film's dark and hopeless atmosphere. As the story of the movie unfolds, the line between what's real and horrifying hallucinations resulting from paralyzing fear can sometimes blur. This thought provoking concept adds a psychological depth to it, making it not just another slasher flick.

The movie is not for the faint-hearted: it features intense, explicit scenes with terrific special effects that give a spine-chilling realism to the gore. Marcus Koch's direction crafts each scene meticulously, keeping the audience on their toes, illuminating enough to induce fear while limiting the visibility just to sustain the suspense. His execution of the unique narrative is marked by a skillful command of tempo and atmospheric horror; every chilling scene is measured not to startle but to fill the spectators with a sense of dread and anticipation.

The screenplay by Joe Davison is rich with suspenseful turns and striking set pieces. The characters feel real; their dilemmas and fears are portrayed convincingly, making viewers bite their nails in suspense. The dialogue is curt and poignant, effectively driving the narrative forward while developing the characters and their relationships in a gripping manner. These finely etched characters and the resulting interpersonal dynamics add to the tense atmosphere, making the movie a multi-layered horror extravaganza.

100 Tears has employed brilliant cinematography techniques, complementing the movie's eerie atmosphere effectively. The judicious use of lights and shadows builds tension, while also crafting a visually terrifying film. The sound design is also deftly done, using music and sound effects to ramp up the tension and horror.

Despite its gruesome theme, the film also manages to subtly comment on the personal demons and psychological traumas that individuals harbor. The harrowing madness occurring in the tangible world is, at times, scarier than the monster who is on the loose. This commentary, intertwined with the suspenseful plot, makes 100 Tears truly unique and gripping to watch.

In summary, 100 Tears takes viewers on a chilling journey, one that will resonate with horror connoisseurs who appreciate the delightfully petrifying combination of suspense and gore. The film masterfully juggles elements of horror, suspense, drama, all while exploring the terrifying nature of the beast that lurks in the dark under the guise of a clown - a sure treat for fans of the horror genre.