Achievements at Fallout 4 Nexus - Mods and community
Hasn't been updated since April, not sure it still works on the latest patch.
Looks like he's keeping up with it. I installed it and fired up the game. Not surprisingly it doesn't "retro unlock" the achievements that I should have gotten... oh well... *shrugs*
I guess when the time comes from a replay I'll be ready to go.