So I've tried a couple different routes going through the mission "Through fire and Flames" with the shadowsword tank.
First I was just enjoying rolling through taking my time to keep the tank alive and such. Then just after hearing the speech from the tank commander about Flavious having a base on that very planet, bam. Game crashes send bug report.
Second same thing.
Then I tried skipping as much as possible, then I tried literally laying waste to every inch. Same effect in the long run. After 45 minutes of being in a tank that honestly moves slower and kills slower than my normal build and crashing I have to just walk away. Every way I try that mission, get to that point or right around, and game crashes.
I really want to like this game. And this isn't the first or even second time I've run into a glitch that makes it impossible to progress the campaign. But, the more I play it, and the more I see these forums FULL of bugs that make the games core story impossible to play/finish for a huge percentage of the player base. I have to assume there was just little to no play test done at all for the consoles. And based on the amount of forum posts prior, they probably didn't test for the PC either.