Similar movies?

I am looking for similar movies where there is a group of people gathered in one area, and are killed one by one. I have watched Harpers Island, Clue, and other And Then There Were None movies. I recently watched The Last Of Sheila. I thought it was fantastic, but if you have seen it (SPOILERS) only a few of the main characters die; same with Clue. Hopefully someone can help me, and hopefully another film like this exists. Thanks for reading my question.