(Game here is Parasite Eve 2)
It didn't happen in every game but often enough that it's noticeable. They're usually not shot as straight-up titillation, instead going for a tasteful nudity kind of thing and intended to fulfill some kind of storytelling or characterisation purpose
"You see, you gotta show them being vulnerable. They may be badass, but they're still girls, after all" 
-90s game director, probably
It compounds it imo. If he'd owned it and just been all "I'm horny" then it wouldn't be such a meme. The End did a similar thing and didn't need to be nude, she didn't need to be THAT sexualised to satisfy "the lore".
Aka the Yoko Taro method.
Yeah like I love kojimbob but omg dude it feels so much more insidious when a guy tries to defend objectifying women like it's okay if man buries your criticism with "but lore" grrrrrrrr.