I am trying to find a title to a movie. Rich men wearing masks are hunting men in a swamp for sport.?

All i can remember is in the start of the movie two men are running one gets killed by a man with a staff weapon. the other is running and a man sitting in a tree wearing a masks sees him and then jumps out of the water and strangles him. then towards the end when one of their prey escapes they fight with swords and he kills the rich man. Hope someone can help me it is bothering me.I am trying to find a title to a movie. Rich men wearing masks are hunting men in a swamp for sport.?
That plot has been used many times. The first time was ';Most Dangerous Game'; (1932). Then ';Game Of Death'; (1946), ';Run For The Sun'; (1956). If you remember it as having been in colour then it's probably the 1956 version.