I'd assume they would play it close to the vest and not release it. If they did, it would probably be after the game's release.
All I need to achieve is being able to play Fallout 4.
Cheevo/trophy lists usually appear a week or two beforehand.
One popped for me today:
"Thank you for being patient" - Only one month to go.
Just watch the Fallout 4 steam page. When they are available, they will be listed there.
I think achievements show up on xbox/ps like a few weeks before released?
Am guessing there will be TONS of spoilers in their descriptions so watch out because once published they will be posted all over
once the cashier hands me my copy, "achievement unlocked" and that's all I need lol I get some people chase achievements but I've never really understood the appeal, especially in a single player game