Hey I'm stuck on this one mission and its super hard. I see alot of ppl have passed it already and gone on to get the big achievements!
I even played solo on EASY! This is so messed up!
When I'm not getting thrown around by the lag during online coop, I'm getting out gunned by dudes behind walls!!!
How do you get passed this mission?!

Note: I played as the engineer during first wave, next was operative and bad guys are everywhere!!! A.I. teammates don't attack the main objective, nor do they guard me! Grrrrr!

Ridiculous!
I've been forced to watch this same "Mission Unsuccessful" cut scene at least 20 times!!!
Half of the team are actual players, and I'm the only one who made any progress toward repairing the crane?!

Edit: Finally!
Got it...

Got it on my second try. Played in a friend and invite only campaign and kept the enemy at their spawn while a bot hacked it for me.