Although sometimes games can have specific sexist elements that don't relate to plot or characters at all.
For example, I don't mind sexulisation, that is putting characters in some what revealing clothing. We have been doing this since ancient Greeks made nude sculptures of their idealized humans, both male and female.
But you have to be fair about it. When an armor set on a male is huge platemail, and the same set on a female is pretty much a metal bra, that is the wrong way to go about it. Why can't the female character wear realistic armor should she so choose? Why can't the guy run around half naked in an attempt to be visually pleasing to women?
You can have women in revealing outfits. That alone isn't sexist. It is when you decide that women must wear revealing outfits that it is sexist.
That fits under what I call "Using sexuality against a female character".
How many of the "Metal Bikini" women are women who could honestly be wearing Metal Bikinis? None of them.
They ALL should be competent enough to know to wear real armor.
It is why I try to seperate sexual characters (sexualised characters who are sexual) from sexualised characters (Sexualised characters who are not sexual).
Of course there are terrible sexual characters who are just as bad... the VAST majority of characters of sexualised characters in videogames are ones who shouldn't be.
How much fanservice is by a woman who wants to give fanservice versus a female who isn't about fanservice?
This difference helps form the idea of a sexual female character existing in an inoffensive form (since like men, women are also sexual creatures) while at the same time understanding why sexualisation of women in videogames is so terrible... because it is against their character/competency/sanity.