Not sure where to address issues and glitches so I'll post here. I ran into an issue playing one of the levels where you meet up with the marines and the city is flooded. The marines kept screaming ' go, move up ' 'faster' for about 20 minutes. I thought it would go away but it never did. I reloaded map and its the same audio glitch. Very annoying, I even kept playing to see if it would fade after a different scene but it did not. The game is really unplayable now, too annoying.
Also I found this weird bug where an alien pushed me but I flew sky high almost out of the map. I landed with armor on a cliff side. It happened twice.. It was that level where you destroyed parts of the alien reactor or whatever that was. Sorry I don't remember map names.