I’ve beat Fallout NV as a true pacifist - no companions, no death caused by me.
It is funny, because it really doesn’t seem to fit the themes of the game to be a pacifist. You end up doing things that would (IMHO) be more fucked up ethically. It’s also hard for me to leave Vulpes alive - killing him is an every play through thing.
I’ve tried playing Morrowind and Oblivion as a pacifist. Morrowind you can get pretty far, but the Sixth House Base quest requires the death of an NPC. Oblivion… lol. You can sorta try if you don’t count dragging along companions from uncompleted quests, but that doesn’t fit the spirit of the challenge.
I wish more video games allowed you to play pacifist. I play most video games with the least violence possible, but even really well written stories like Planescape: Torment need you to solve some problems with violence.
I’ve really appreciated games like Undertale and Dishonored too.
Kingdom Come: Deliverance has an achievement for a main quest line pacifist run. There is one NPC you have to kill for story reasons which apparently doesn’t count towards that achievement.