"I HAVE CONFIRMED MY THEORY.
I finally got a win on "Unknown Regions" while playing as the attacker (the Resistance) and that gave me "A Tremendous Service" after the round.
This confirms my theory that the bugged milestones are keeping people from getting this.
The ones I know are bugged:
Aggressor
Defender
Disrupted Enemies
Just in Time"
Are you actually seeing those as completed beforehand and claiming the reward? I have everything completed and every reward claimed - with every number/number showing that the achievements are complete yet I still can't claim this final achievement...
