"Until Dawn" appears to be the horror genre at its most recognizable. There's a cabin in the woods, of course, and a cast of good-looking actors playing a type rather than a character — the jock, the blond, the class goof. The bulk of them are really quite horrible people, in fact.
There are scary movie tropes aplenty. Yes, there's a clown mask, and there's even a scene involving a Ouija board. One extended sequence has actress Hayden Panettiere in a towel. Open a cabinet, and out will come a rat, launching directly at you as if a spring board was built under the bathroom sink.