The Gambler (1980)

You Got To Know When To Hold 'Em, Know When To Fold Em...

This Western adventure, inspired by Kenny Rogers' hit song, tells how fictional gambler Brady Hawkes, going in search of a young son he never knew he had, teams up with an impetuous young admirer and a shady lady on his journey, which also involves him with an arrogant railroad owner and a gang of villains.