In terms of challenging and avant-garde approaches to storytelling in the medium of filmmaking, the thriller genre has proven to be one of the most effective avenues for non-traditional and experimental filmmaking styles. Ranging from films that focus on an array of deeply disturbing and painful subject matter to those whose very execution is tied to non-traditional storytelling methods, there are many different ways a thriller can be considered challenging .
Especially with 100 years of evolution and growth for the genre during the 20th century, thrillers soon became much more comfortable with complicated stories. These deeply challenging thrillers have grown to be some of the most respected and acclaimed films of their respective eras, as scholars and audiences have deeply examined