The Tournament (2009)

Genre: Action
Director: Scott Mann
Country: UK
Language: English
Tagline: Every Ten Years The World's Greatest Assassins Gather ... Only One Will Survive
Starring: Ian Somerhalder,Robert Carlyle,Ving Rhames ..

Plot: Every seven years in an unsuspecting town, The Tournament takes place. A battle royale between 30 of the world’s deadliest assassins. The last man standing receiving the $10,000,000 cash prize and the title of Worlds No 1, which itself carries the legendary million dollar a bullet price tag.

http://www.imdb.com/title/tt0471041/
http://en.wikipedia.org/wiki/The_Tournament_(film)