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.
Disco Elysium has a number of potential soft locks, though you kind of have to go out of your way to actually get into one. The easiest one is probably paying for your hostel room the second night. Usually a combination of decisions and unlucky dice rolls are necessary to actually get locked, and/or poor use of skill points (meaning you can’t spend one to re-try the crucial roll).
There is also a seemingly minor decision in a side quest that can make a certain check during the ending unwinnable and thus lock you out of one of the most impactful moments in the game.