Interesting. New recent legislation in Nevada to allow video game playing gambling on slot machines rather than the pure simple randomness of current slot machines. So a machine's normal 88 percent payback might increase to 98 percent "if you’re particularly skilled at shooting down enemy planes in the bonus round or outracing your friends in a road rally."

http://arstechnica.com/tech-policy/2015/05/skills-based-video-game-playing-gambling-coming-to-vegas-casinos/

Robert
.
.
Dale Robertson (2L) in "The Gambler From Natchez" (1954).
http://www.antiquegamblingchips.com/StillsD_Westerns.htm