The Cabin in the Woods

Melody Riverson just woke up in the woods, and doesn't remember a thing. She's all alone. She meets ten other people only to find out that they all are part of the sick little game someone put them in. When some of the other people start to go missing, she starts to realize someone or something is hunting them. She tries to hunt down whatever is hunting the group. In all it all comes down to this question. Who's hunting who?