On December 24, 1954 the American blues musician Johnny Ace shot himself to death in Texas playing Russian roulette in a dressing room before a concert.
John Hinckley, Jr. was known to play Russian Roulette, alone, on two occasions (although neither time he pulled the trigger was the bullet in the firing chamber). Hinckley also took a picture of himself in 1980 pointing a gun at his head.
On February 28, 2000, Rashaad, A 19-year-old Houston resident attempted to play Russian roulette with a semi-automatic pistol, apparently unaware that the mechanics of the game change with a weapon other than a revolver. However, the Darwin Award sources are often suspect. 
On June 12, 2001, Clinton Pope, a 16-year-old young man with a criminal record who had been drinking and smoking marijuana for the night, fired a bullet into his face while playing Russian roulette before his friends in St. Petersburg, Florida, U.S. He was sent to a hospital and was in critical but stable condition.
On March 29, 2003, Evan Below, a 14-year-old boy, shot and killed himself while playing Russian roulette with a .38-caliber revolver in the kitchen of a friend’s house in Casper, Wyoming, U.S. The weapon was taken by the houseowner’s son from his mother’s bedroom.
On August 7, 2004, Samantha Goodson, 16, shot her boyfriend, Michael Gerald Henry, 18, dead while they were playing a version of Russian roulette in a house in Jamaica, Queens, New York, U.S. She was charged with manslaughter and criminal possession of a weapon.
On August 23, 2004, a 25-year-old Greek soldier, Antonis Syros, was shot in the forehead by a revolver that had held a single bullet at the gates of an Olympic village at Mount Parnitha in Athens, Greece. He was playing Russian roulette “jokingly” with Christos Chloros, a policeman, while he was standing guard.
On March 17, 2006, a 15 year-old teen named Astrid Uytterhaegen shot herself dead while being peer pressured into the whole incident & game by her associates. Her body was supposedly found in a ditch, where she had been left to hide any evidence. Traces of alcohol had also been found. (This seems to be a wrong information as you can see from the comments on this article. Astrid Uytterhaegen never died, a friend of him put that on Wikipedia as a joke and never took it off.).
On April 14, 2006, a 16-year-old teen from Peoria, Arizona shot himself to death while playing Russian roulette on his porch with a friend.
On June 8, 2006, 16-year-old Sean Jones from Jacksonville, Florida shot himself to death while playing Russian roulette on the front porch of his friend’s house. He only fired once.
In addition to these specific incidents, it has been alleged that William Shockley, co-inventor of the transistor and winner of the Nobel Prize for Physics attempted suicide by playing a solo game of Russian roulette .
Video: Russian Roulette Goes Wrong (A magicians big finish goes horribly wrong as he attempts the worlds deadliest trick. )