With so many wildly successful and well-crafted animated films being made for audiences of all ages, it's no wonder that the genre as a whole has often been defined by these films and considered by many to be more simple, kid-friendly cinema. However, animation has a multitude of layers and approaches to it, as there are also a great number of films that go to great effort to present captivating, well-crafted cinematic experiences for adults that make the most of animation as an artform.
Even beyond the family movies that have intelligent filmmaking and depth for older audiences, the rare R-rated animated film is a true sign of creating an experience defined by its mature themes. Whether it takes the form of a raunchy, over-the-top comedy that one would expect out of an R-rated comedy or tackling the type of painful, emotional themes that only R-rated filmmaking can allow, these animated films have stood as pillarstones for what adult animation can be in cinema.