Last Spartan Ops achievement

So I’m looking at my Spartan Ops menu right now in the game, and it shows that I have beaten every SO mission on Heroic or Harder… But I don’t have this achievement…“Dedicated to Crimson”

Anyone else?

Don’t know once I did the 5th EP I got it.

Just replay any mission and the achievement will pop.

Does no one use google anymore?

Why use google when I can increase my post count?

Try replaying one of the earlier missions, shouldn’t matter which difficulty. I soloed the very first mission after completing Episode 5, and the achievement popped. No idea why that works, but lots of others have had success doing the same thing.

It has to be done on at least heroic, and you just need to keep killing prometheans until you get the achievement. It doesn’t matter how many times you die, or if you loose one objective during defense part. You just cant activate the button at the end that activates portal. You need to keep killing enemies and you will eventually get it.

Well I just replayed another mission, and yes it was on Heroic, and still nothing.

If you did them all on co-op in mm then you need to simply run one mission in each episode on solo to pop the achievement. It makes no sense but I had the first three episodes done on Solo and 4 and 5 on co-op went back and did the first mission on 4 and 5 solo and it popped.

Well I thought I would give the first mission on normal a try, got it then. Odd…