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.
It’s not quite what you’re getting at, but in Bubble Bobble Revolution you can’t pass level 30 because the boss doesn’t spawn. It’s a soft lock but there’s nothing you can do to avoid it, and the game is on the DS so there’s no updates to fix it :D