I'm so pissed off. It all started with the marines keep on yelling "Move on, Gooo" the entire time every 2 seconds. I decided to keep playing till the next level, assuming it would stop eventually. I get to the end of the level (protect evac zone at the chopper)... By now, all character models are gone, guns are shooting in mid-air. No aliens visible but they are shooting... No single way to move forward in campaign. Read somewhere to jump up the ledge behind the chopper, but i can't move when i get up there. This **** svckS !!! Give me a sollution.

Step one, turn off your volume...
Step two, after the final script fails, and it will, jump up the cliffs on your left and just run to the end of the level.
Not sure how a bug this bad got thru to release, it might be the most annoying bug ever.

The cliffs u are talking about...they are the ones behind the tail of the chopper, right ? I got up there twice already and when i get up there...I can't move forward at all...