This is a great one. Dropped 60$ on this game today and I can't go beyond 2 minutes in the first mission because of this bug.

When the mission first starts there are a few guys talking to me in the submarine. All of these people are invisible/not rendered but I can hear them talking.

When the submarine crashes and I am instructed to "move move" there are also no people visible but I hear them talking. I had to look up the mission on Youtube but apparently I get to a point where I have to help someone open a hatch to continue on. Since this guy is invisible I can't help him open the hatch.

Every few seconds I hear "Move move move" as if I am supposed to be doing something but I'm stuck at the hatch and can't continue on.

1. I've turned graphics all the way down
2. I've enabled/disabled the high texture pack & Direct X 11
3. I've rebooted
4. I've re-installed the game
5. Updated my video drivers (3 weeks old)
6. Pulled a little bit of hair out

Doesn't seem to help..

Specs:
ATI Radeon 5770
Windows 7 64 Bit
8GB DDR2 RAM
AMD Phenom II 945 3.0GHZ Quad Core processor

This is frustrating as hell. Now after messing with this for a couple hours I have to get ready to leave for my grave shift. Does anyone have any insight to this?