The movie is about two brothers who plan a fake reality show. A group of young people volunteers and they are going to stay in a house with microphones and cameras installed. They think that they are going to win money. But it turns out that in the games they are playing only one will survive, and one by one they get killed. One of the brothers were stood up at his wedding and now he want's to take revenge.
It's a little bit like the movie "Saw".

Cruel World (http://www.imdb.com/title/tt0419663/)

Thank you :)