According to multiple sources, the goriest Saw movie is generally considered to be Saw III. This movie features some of the most brutal and disturbing scenes in the entire franchise, including The Rack and The Pig Vat. However, other movies in the series also have their fair share of gory and violent traps, such as Saw V, Saw VI, and Saw 3D. Ultimately, the level of gore and violence in each movie is subjective and may vary depending on personal preferences.