It's definitely earned its adult rating. It's EXTREMELY bloody and gory, so if you don't like blood, change your mind about this. I would like to note a warning of strobe lights used throughout the movie, so if you are epileptic, this isn't the best idea. Expletives are used every five minutes or so, mainly generic. The worst shots for me, a 14 year old, were a nightmare where a zombie rips off her face, and one of the zombies gouges eyes out a bit later in the movie. I'm not sensitive to gore, so this was a relatively easy movie for me to watch. There are few jump scares, and mostly revealed or provoked by music. However, they must have spent half their budget on making the infected look bad and the other half on fake blood, and sure as hell not scripting. Just a note.