Just got back into the game and haven't played since I first finished it. I'm going for all the achievements and am wondering if it is easier to complete every mission on insanity or to beat the original maps on gold?
Beating the original maps on gold will be quicker, and IMO, easier too. Get a few people from here to help you. Shouldn't be a problem.
EDIT: I should clarify, gold enemies in MP are tougher than SP insanity enemies. Doesn't change my recommendation though. --- (Im)mature Aussie gamer. Don't pay the ferry man. Don't even fix a price. GT: Charon78
You might as well do the SP missions on Insanity, since beating the game on Insanity is an achievement anyway. Might as well get em both. --- It's only after we've lost everything that we're free to do anything. - Tyler Durden