Thriller is a genre of literature, film, videogame stories and television programming that uses suspense, tension, and excitement as its main elements. Thrillers heavily stimulate the viewer's moods, giving them a high level of anticipation, ultra-heightened expectation, uncertainty, surprise, anxiety and terror.uspense is a crucial characteristic of the thriller genre. It gives the viewer a feeling of pleasurable fascination and excitement mixed with apprehension, uncertainty, anticipation, tension, and anxiety.