Halo: Reach achievement problem

Hello, Ive been browsing my reach achievements and noticed that i dont have achievements for completing chapters 6 and 7. Ive done them alone on legendary difficulty, and its little bit frustrating that it didnt count. What should i do? I dont wand beat this chapters again - beating them was real pain.
 

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Last updated July 4, 2018 Views 7 Applies to:

Hi. I have seen this issue a few times before. Basically, you will need to beat them again solo, or try to beat them in Co-op for them to unlock. I was on 343 forums and that is what I have seen as the solution.

E-A-G-L-E-S EAGLES!

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I should beat them from very beginning or can I just go to the end from rally point bravo?

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Apparently you need to beat them from the begining.

E-A-G-L-E-S EAGLES!

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Doing the levels on normal should give you the achievements much easier and there is a guy on youtube that has LASO speedruns for each level if you want to get them done that little bit faster which would be if you completed them on normal! Link to his youtube is here if you want!

[View:http://www.youtube.com/watch?v=ZzMs3eGqick]

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