Originally Posted by RDrules
now those are the best multiplayer achievements ive ever seen... do something in multi or something more in single player
I totally agree. So that's settled for me a my brother and just one Online Pass. It's a neat 1000 for both without the need to waste 800 MSP.
About the Master and Commander, I think N7 missions work towards getting war assests for Galaxy at war since Tour of Duty says "Finish all multiplayer maps or all N7 missions in single-player".
If I'm right you should get war assest doing multiplayer missions, and since N7 missions are the single player equivalent they too should count toward it. We'll learn it soon enough.