Finally, girls can play video games

[Miriel]

To be clear, the word bitch itself doesn't raise my eyebrows, especially considering how common the usage is these days, without any sexist overtones. I use it, other people on this forum use it, people use it jokingly or seriously, in glee or anger or pride and that's all fine. Examples:

Britney Spears: "It's Britney, bitch"
Tina Fey: "Bitches get it done"
General, commonly used phrases: "hurts like a bitch" "bitch, please" "son of a bitch"

Whether or not a word is offensive is almost always situational.

In this situation it was used as part of a statement declaring that a female character, a bitch, unequivocally lost a contest. When the word is used casually in that kind of context, it makes me do a double take. Much more than an outrageously sexist video game that most people consider to be ridiculous.