Common Sense Note
Parents need to know that this is more violent than the previous A Fistful of Dollars. Killings include a wife and a baby, something quite shocking for the era (though they are shot to death out of camera range). The two "hero" characters are tough, ruthless gunslingers themselves, who in one not-to-be-imitated-at-home scene prove their targeting skills by shooting at each other's hats.
Sounds of a saloon girl and an outlaw having sex behind a door. She's glimpsed close to topless in the tub. Another quick-edit shot of a woman in bed getting her nightgown ripped off her.
Lots and lots and lots of shooting, with six guns and rifles. A stabbing. A man's wife and baby are shot to death (off-screen). With one exception, there's no blood visible, just plenty of bodies.
The Man With No Name and Col. Mortimer are both the "good" guys, but their motivations are profit and revenge, respectively. One villain is a "hunchback," reinforcing old horror-movie stereotypes.
Drugs / Tobacco /
Saloon drinking, and Eastwood and others have cigarettes clenched in their teeth a lot of the time.