JaguarUSF wrote on Feb 27, 2012, 18:14:

Prez wrote on Feb 27, 2012, 16:06:
the only feasible way of finishing the campaign in single player is unlocking the necessary units in multiplayer?

It was for me. I had to level up in multiplayer (it only took 3 games) to unlock enough points to pass the 2nd or 3rd scenario in the game. The campaign has some real balance issues that could have been solved if they simply added a difficulty slider that added or subtracted enemy units.
That said, multiplayer is fantastic.