Allright, I finally got past that submarine in Infernal Machine. It's one of those situations where you're swimming through narrow tunnels and keep coming to a dead-end, only to eventually find out you missed another door along the way because you can't really see it when you swim past it. Once I found that door I got to the key right away.

So, now I'm in a temple that's inside a live volcano. I reached a point where I pushed a button, but I don't think I should have done that because it made the whole room fill with lava, and then I couldn't figure out what to do. I'll have to restart from an earlier save (but I just saved only a few steps before I reached that room, so it's no big deal.)

The game hasn't crashed, but I did get stuck in a wall again. I had just saved before that happened, so I was able to restart from that save.

I've also noticed a consistent glitch in Level 5 - if you're in the water and head towards shore, it's possible to pop up onto the shore and have Indy running around without his hat (he always removes his hat when he swims but puts it back on when he climbs back on shore). If that happens, you can't use any of your buttons. It's easily rectified by jumping in the water and climbing back out the correct way, but I have never seen a game this glitchy in my entire life.
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I sailed on the wings of time to be with you
I followed this dream of mine
And I'll see it through
It was a dream and a promise that I intend to keep
Right here within my soul so deep