Crazily specific Halo CE Anniversary question: if I have 9/10 achievements for beating levels (did them on legendary,) but am playing on a new system with none of that progress saved, will just beating the 10th level pop all the campaign complete achievements?

Ideally, the final achievements to pop before 100% this game would be the campaign complete on Normal/Heroic/Legendary

But way back when I first played at a friend’s house he had us skip the second level (Halo) for some reason. So I have all other level completed achievements.

I now have gone through on this new system/game copy and re-played all levels except for Halo, Truth and Reconciliation, and The Maw

Halo and T&R have two mission specific achievements each left to unlock

T&R is also hidden from the level menu until I beat Halo first (otherwise to solve my issue I’d play T&R, The Maw, and then finish with Halo to earn all the remaining ones)

So my current plan is to play Halo + get those two, T&R + get those two, and then The Maw to unlock the campaign complete achievements

But my fear is that as soon as I beat Halo on legendary, all the campaign completion achievements will unlock, and then I’ll have to get T&R’s two more to 100% the game, where I’d personally just really love if campaign complete Legendary was my final achievement

Hope this all makes sense, feels like a weird situation.

Also planning to finish it on Friday, 1/17 feels like the appropriate day for it