Maybe I missed it,
When we are going for the difficultly related achievements in solo campaign, co-op campaign, and Spartan Ops. Can we just "mission select" them all, or does it have to be done in order? Hopefully at least the co-op lets you do it in any order. It seems that way with the co-op, I just want to be sure.
It might be tough for me to find someone to play the campaign all in order. I'll be lucky if I can find people on here to just do it one at a time.