When I was younger I watched a movie on Hbo or Cinemax. All I remember is, they are in like a mall and it's a contest to find a hidden bag of money. They the contestants a start time and drop a bunch of guns and weapons out and basically they kill each other off looking for the bag of money. At the end there are four people left an they have a shootoff. There are like 50 contestants.

Sounds like Mean Guns (http://www.imdb.com/title/tt0119642/)

Sounds like Mean Guns (http://www.imdb.com/title/tt0119642/)
It was, I found it last night about an hour after making the post. Only took me two years to figure it out lol