As for Dog, the constraints on him were many and I often found myself arguing against including him in certain scenes because I was afraid we wouldn't be able to do it right. Fortunately, certain animators shouted me down. More importantly, they then went on and did the work to make sure that wherever Dog appeared, it was more than worth the time invested.
Laidlaw: I'm always surprised to hear that people found the ending sudden, since I thought from the opening scenes of the game we'd made it pretty clear where you were going to end up and who you were going to confront. It was the coolest ending we could dream up that seemed fitting to Gordon Freeman's role in the universe. I don't think a denouement would have added much to the game, and in fact would have closed some options that we're glad (in Aftermath) to have left open.
The above article originally appeared in PC Zone magazine, issue #160. Keep 'em peeled for issue #161, out this week on October 13.