Animation in itself is good.
First couple of seconds just remind me how much I wish the Black Mesa Source guys ought to get their asses to release time.
Then there's a lot of stuff that looks like it's Duke Nukem come to do Gordon's work, right up until the shot of the Aral "sea". And some moron shouting "STRIDAAAR".
And from there it might as well be Halo or whatever.
And yeah, I like Escape From City 17. Subscribed to their youtube ever since they put it up there. Too bad there was never a part two...