So I got the Fallout 1, 2, and Tactics bundle that was on here a while ago. I got pretty far into the game without having any serious issues... smaller glitches are pretty common in this game, but none that really ruined the experience until this,

I'm in the Raider caves south of Vault City, after having ignored that quest earlier and went on to New Reno. So I just returned to the caves with Cassidy, and the entire game crashed a few seconds into the fight.

I opened it back up and it said the save file I made right before the fight was unable to load, and brought me back to the title screen. I had another save near then, and got back there. I was able to get a ways farther into the fight and saved on 2 different slots. I also cannot save on the corrupted save slot, and I can't load it. Then it didn't crash that time, but brought me back to the title screen all of a sudden. Both of those save slots can't load now either.

I patched the game with the unofficial v1.05 patch, and tried from an earlier working save. It crashed the whole game again, and the new save file I made there is corrupted now too. Any ideas of how I can fix this before every open save slot is unable to load?