I have gotten to the point where you are destroying the alien generators. I just blew up the generator in the Cyro Lab and the teleporter isn't working, I activated the button thing in front of it to but still nothing. I am stuck in there because the doors where I came in are locked. This is the second time its happened, first time I had just finished escaping the trash place and that teleporter didn't work so I had to reload everything back to where i wasn't even in the engineering core. Please help, btw this is the GOTY edition, I don't know if thats of any relevance though.