Fallout 2 > Fallout 1 > Fallout: New Vegas > Fallout 4 = Fallout Tactics (idk which one is worse) > Fallout 3 > Fallout: Brotherhood of Steel
with mods being
Sonora > Nevada > 1.5 Resurrection > Olympus 2207, but it's kinda unfair since all of them do a different take on Fallout
> most cohesive and refined attempt to capture the idea of Fallout's take on post-apocalypse
> Fallout 0 in a universe where the series died in 2004, never to return
> Fallout 1 if it was released by an obscure Czech studio and became a cult classic
> a post-apocalyptic CRPG if it followed how Europeans see post-apocalypse instead of Americans
>>715450556
I'd say Nevada first because it's a very peculiar experience (imagine a Fallout game where supermutants don't exist yet, Gecko is just lifeless ruins of an NPP because ghouls haven't migrated there so far and Vegas is straight up Las Vegas) and there's A LOT of things in Nevada to the point devs actually cut some things in newer updates. On the other hand, Sonora is just perfect with what it does, but is considerably leaner around the curves. If you only have time to play exactly one game, do Sonora, but if you like the classics, I'd rather play all four of the mods just for the perspectives they offer.