*POSSIBLE SPOILERS*

So, I completed this quest 100%. I even reprogrammed their flight path so they have a better chance, watched the rockets take off. It said quest completed, but no achievement? Why is that? What's the trigger?

Not a HUGE deal, but it would have been nice. Fighting those nightkin was a [censored], thought I'd get something out of it.

I'm going to go out on a whim and say yet another bug to toss on the rapidly growing unoptimised pile of crap that is fallout new vegas. Hurray for bad ports :brokencomputer:

Well, I think I found out what it was.

I went back down to the rockets, where Chris is. I talked to him and he said, "Not now, the Great Journey is starting." I was like, "WAT" then I looked out the window and one of the ghouls is still walking around down there in his space suit. My guess is he didn't get in the rocket before take off, and that is the achievement trigger or something. Because my Pipboy shows the quest as completed.