Violence as a part of combat, that is to say, in furtherance of a political objective, provided the violence is against combatants is mostly ok in video games.

Straight up torture - a person who is captive, has already surrendered, etc is not “fair game” in any sense of the word, not even by a stretch. They cannot shoot back, etc.

The same goes for sexual violence. If a character is raping another, the victim has to be incapacitated.

If we were a society of black widow spiders, then I’m sure sexual violence would be fair game because it would be very risky for the male.