I was playing this last night, escaping after chamber 19, got to the bit where you have to get a turret to shoot a glass tube that then drops a block. You use that to go through a short vent with a fan, and are lead to sewer area. While on the long edge bit you portal to, the game automatically saves. (You then apparently reach a bigger chamber where you have to take out some turrets.)

It was getting late, so I saved just after the automatic save, in the chamber before turrets. Today, I fire up the Deck after work, there's an update for Portal. I run it, load the save, black screen. Game closes. I try again, same thing. I go back to an older save at the cube and the vent, that loads. Ok. I go on, get to the sewer and the bit with autosave, black screen again and game crashes. I try again, same thing in the same place.

I now can't seem to be able to play the rest of the game, and it's not even bc of a corrupt save. Bummer.

Should I try it on my laptop on the off-chance that the issue only occurs on the Deck?