Achievement not unlocking

I am having an issue with the achievement Dedicated to Crimson. I have completed all of the chapters for each of the first 5 episodes and have yet to receive the achievement. Does it matter if they are not all on the same difficulty to unlock this achievement? Any help would be appreciated.

Just replay any mission. If i had a pound for every time i saw one of these posts…

Same here, except mine is the challenger one for 25 challenges completed and i checked my service record and it says 25 done.

> Same here, except mine is the challenger one for 25 challenges completed and i checked my service record and it says 25 done.

Complete 1 more challenge and you’ll get it.

> > Same here, except mine is the challenger one for 25 challenges completed and i checked my service record and it says 25 done.
>
> Complete 1 more challenge and you’ll get it.

Ok thanks, i will do that when i get home from school.

Yeah I have replayed all the chapters from this one over again and got nothing. Rather not have to go back and replay every single chapter over againto get the achievement.

The same thing happened to me, I just finished Episode 5 and no achievement. Do i just play a chapter over again or all of them?