so I finished the campaign, did every mission but the second part of the two sided ones and now I want to max out the upgrades at the armory to get teh achievements. There does not seem to be a way to do this from the mission archives list. Is there some way that i am missing? Do I have to go through a whole new campaign to get the upgrade achievements, possibly more than once because it requires a lot of money??
You cant buy stuff from the armory once you beat the game, you are supposed to do it before you beat the game, once you start selling research points for 10k each, replay an old mission in the archives and when you head back to the lab, and click on the console you get 10k for each point you ever sold. --- Wizard's First Rule: People are stupid; given proper motivation, almost anyone will believe almost anything.
start a new one, but dont upgrade anything. Unlock very tech then save your game. Then just buy all of the infantry upgrades until you get the achievement, then reload the game, then buy the starship upgrades, vehicles etc.