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It appears that the Liberty Campaign -> Story Mode Achievement, "Hurry Up: It's Raid Night" is bugged.

Hurry Up: It's Raid Night
Complete the Wings of Liberty campaign under 8 hours of total played mission time on Normal difficulty.

I've completed the campaign (including the Protoss mini-campaign) in 7 hours, 34 minutes and 41 seconds, on Normal difficulty, yet no achievement was rewarded. The Achievement servers were/are up for the full duration.

For clarity, these are each of the mission times:
Liberation Day: 2:28
The Outlaws: 4:16
Zero Hour: 20:12
The Evacuation: 24:33
Outbreak: 20:30
The Devil's Playground: 12:16
The Great Train Robbery: 24:08
Safe Haven: N/A ***
Haven's Fall: 15:09
Welcome to the Jungle: 20:39
Smash and Grab: 11:17
The Dig: 34:22
Cutthroat: 16:23
The Moebius Factor: 18:52
Engine of Destruction: 23:08
Media Blitz: 12:58
Piercing the Shroud: 18:57
Supernova: 20:08
Breakout: N/A ***
Ghost of a Chance: 8:51
Maw of the Void: 18:40
Whispers of Doom: 17:36
A Sinister Turn: 11:57
Echoes of the Future: 17:53
In Utter Darkness: 34:20
The Gates of Hell: 12:26
Belly of the Beast: 20:34
Shatter the Sky: N/A ***
All In: 30:08

Has anyone else been able to unlock this achievement?

Kinda bummed after all that effort!

why are you putting N/A on 3 of the achievements? i hope you realise you require 29/29 missions under 8 hours.

skipping 3 missions places you at 26/26. which is 'clocking' the campaign.

you must go back to the mission archives and play those 3 extra missions from the "other story mode" which it didnt give you during campaign.

I wrote N/A for those ones because they're the split path missions. Considering the campaign doesn't prompt you to return to the mission log and complete the alternate scenarios for each of those missions, nor does it impact the story, I assumed they were irrelevant.

Are you certain that this is the case? I noticed you don't have the achievement either.

I've completed 29/29 with less than 8 hours and I'm experiencing the same problem as you. Kind of ridiculous, wonder how/if it'll be fixed.

I can confirm that to get this Achievement you can get it by completing the campaign from start to finish in under 8 hours.
I did it in about six+ hours game time and maybe 4.5hr's or so real life time on the fastest setting.
And that is without using using mission archives and you can skip as many levels as possible.
I can't confirm if it was ever intended for it to be done by mission archives though if it was ever meant to I'm sure it would have said so, so I don't believe it was ever broken.
If you take it at face value it stays complete the game not do the best times in the archives nor does it say to do every level, those are givens, what's not given are the shortest maps etc. but with the time I got I don't feel like sharing, it was too easy and I'm sure you can figure the rest out for yourselves.
Now to try for brutal...muahaha, brutal is a peace of cake....muahaha, or at least the first two levels are...hate it assume things they haven't even done, brutal is rather not so easy

Thanks for clearing that up Waddo :)

I've completed the campaign (including the Protoss mini-campaign) in 7 hours, 34 minutes and 41 seconds, on Normal difficulty, yet no achievement was rewarded. The Achievement servers were/are up for the full duration

I counted 479mins 37seconds, maybe it rounded up to 480mins which is 8 hrs that is why you didn't get? Haven't tried it yet though...