Can't Think of This Movie Title!

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Don't you hate when you can't think of the name of a movie title? You even search about what the plot is and everything and nothing comes up? That's where I am tonight. I have done this in the past over the same movie and couldn't find it. I don't know if I should even write what it is about here and ask because I think it was such an obscure movie that not many would know it. I'll try and maybe someone will. The movie is a thriller/horror movie that came out probably before 2012. Don't remember how old it was when I even saw it. The movie was about this group of people, they were taken in a van to an abandoned warehouse and were forced to play a "game show". The ultimate prize was money, but if they lost they died. I remember that there was a saw like character. Each "game" I think was more of a trap. One involved a room with knives. Does that sound familiar to anyone?