i got 2 teams, the giant thor can be on its own, it goes to the right, another team take the air base on top left, then join force back to center base.

the giant thor can move right away after the timer start while you making another team, just make sure its repaired, being some scv with it, turn off the auto repair, cause if they attempt to repair when its attacking, very high chance they will be killed, manual repair better. i think i did it in like 15-16mins. i didnt do the secret mission objective along within the 20 mins, so i redo the mission which take longer. i think u can do it along with the 20 mins, just make another small team, few marines will do, nothing there to attack you.

actually i thought must straight 8 hrs but it seems like don't have to be that way. just replay campaign enough already.

http://sea.battle.net/sc2/en/profile/11653...ategory/3211285

Wings of Liberty: Hard 5  <=--- should be this one, right?

you can see my completion is 4 out of 5. 5th one needs 25 missions to be done, which I already done that but i also donno why it doesn't count.

If you scroll down my achievements,

Liberty Completionist: Hard (Complete all 29 Wings of Liberty campaign missions on Hard difficulty.) I'm already 28/29.

so with what you brought up, i feel like i kena short-changed. 28 mission on HARD and the fella don't give me 25 mission reward.