Personally, these achievements are bugged for me. I’ve done what’s required, but it says it’s either 97% or 75% done.
Dawn- Beat dawn on halo 4
The Legend of 117- Beat halo 4 on legendary
Cario Station- beat Cario station halo 2
Outskirts- beat outskirts halo 2
Metropolis- beat metropolis halo 2
Delta Halo- beat delta halo halo 2
Warrior- beat every halo 2 level on normal
Tighten up the graphics- see every halo 2 level having seen it in old and new graphics.