The thought came to mind after reading a recent post about Baldurs Gate 3 here but it reminded me of the Japense only PSX game Mizzurna Falls where if you don't perform a certain action early in the game you are prevented from getting a true ending. While this might not be a traditional soft lock because you can still progress to a point it made me wonder none the less.
I understand BG3 might be a hard lock because the game abruptly comes to a close I am not going to get into the semantics. The only other soft locks I can think of are with Pokemon.
Shout out to the fan translation of Mizzurna Falls. An article on the ROMHacking.net website can be found here.
The game remembered a lot of things but you very much could do a pacifist run by starting a new game. I read about the pacifist run after about an hour into the game, decided I wanted to try it, and restarted and was able to achieve the best ending.
Yeah, you’re only locked out of pacifist if you previously did a genocide run
Edit: looking at the wiki, this isn’t true, there are minor differences in the soulless pacifist run tho