Jeremy of We Got This Covered wrote, "Carnage may sound like a tedious film on paper, four actors in one room/area for the length of the film, with the only outside interference coming from the occasional phone call. It’s both a comedy and a drama, providing you with a first class look at the breakdown of general human behavior. It works wonders as a comedy, with veteran funny man John C. Reilly keeping the mood light and fun, but it’s not afraid to break loose and let the normally serious Kate Winslet, Jodie Foster and Christoph Waltz in on the action. Carnage is both extremely funny and downright interesting and hard to stop watching because of how it touches up on so many emotions, ideas and the basic nature of how humans function. Only Roman Polanski could make something like this work."