To be totally clear: FNV branches quite a bit. It is impossible to get all of those quest-specific achievements on a single playthrough. It will take several to get them all. The point of doing that is that every playthrough you'll walk away with a handful of achievements no matter how you play.
It's pretty annoying when I play a game to completion and still only have 100 achievement points to show for it.
Doesn't matter since someone could have multiple saves for different paths, especially right before if they asked an NPC to join a particular faction. It's called save exploits pertaining you make several saves based upon branching choices.
The way I see it, save A will be NCR, Save B would possibly be with Caesar's Legion and so on. That's why for FALLOUT 3 I kept a save from a way earlier playthrough and decided to go the evil karma level and slavery achievements. That save is only at level 6 while my goody two shoes is at level cap. No idea how I'll go about doing neutral. I've done the same things for Fallout 1 and 2. Have a highly intelligent character for a "normal" playthrough of the game and another character which is extremely low intelligence just to see what sort of amusing dialog options would turn up.
My goody little two shoes character is still exploring the Capitol Wasteland.
Actually the achievements don't matter until they have nice individual Vault Boy icons for them. In fact I'm also wondering what the Vault Boy icons will be for alot of things in game. Glad to have alot of the original back for FALLOUT: New Vegas.
I was going to mention something else but I'd be going too off topic for this thread.:wave: