Argthtjtr

'Melodramatic' - most commonly used for movies where emotions interspersed with exaggerated characters, cheesy lines, catchy music and background scores are used to create sensations.

"It makes me sick when movies with unrealistic and melodramatic endings become huge hits."

Others words can be -
saccharine, sugary, maudlin, sloshy, sloppy, rabble-rousing

Schmaltz was mentioned earlier.

I submit sappy:

http://dictionary.reference.com/browse/sappy?s=t

Oh, come on! It's a tearjerker!!

a story, song, play, film, or broadcast that moves or is intended to
move its audience to tears

Perhaps the word you are looking for is schmaltz:-

1. Informal

a. Excessively sentimental art or music.

b. Maudlin sentimentality.

[American Heritage Dictionary]

How about corny? I have used it to talk about movies that are sappy, too sentimental, or try hard to make you feel something. It's a bit dated but still works.

More technical terms would include "emotionally manipulative" and "sentimental."

More informal terms, however, would stretch from "cheesy" to "sappy."

There are so many specialized words for this though, you can even find words that hone in on what particular emotion the movie is milking--sad, happy, heartwarming, etc.

I would also compare cloying, from cloy (v):

To cause distaste or disgust by supplying with too much of something originally pleasant, especially something rich or sweet; surfeit. [source: AHD]

For example, used in this New York Times review of The Hunchback of Notre Dame (1996):

Or so it often seems during "The Hunchback of Notre Dame," the latest and most uncertain of Disney's animated efforts, with its manic mood swings and cloying, none-too-cuddly hero.

Contrived

Definition:

Adjective
1. obviously planned or forced; artificial; strained:

Use in a sentence:

A contrived story.

Source: http://dictionary.reference.com/browse/contrived

I'd suggest,

mushy

informal Excessively sentimental: a mushy film ODO

gooey

Mawkishly sentimental ODO

Another word commonly used in reviews is Camp which according to M-W means:

"style or mode of personal or creative expression that is absurdly
exaggerated and often fuses elements of high and popular culture"

In this case however the emotion being invoked is frequently humor or nostalgia through over the top references to other eras, styles, cliches, etc. Many movies fit this criteria, a couple examples would be Expendables 2 and Thankskilling

Do you mean cliche?

from wikipedia:

A cliché or cliche (/ˈkliːʃeɪ/ or /klɪˈʃeɪ/) is an expression, idea, or element of an artistic work which has become overused to the point of losing its original meaning or effect, even to the point of being trite or irritating, especially when at some earlier time it was considered meaningful or novel.