12/12 LASO campain, no achivement

Games Halo: The Master Chief Collection
1

Hello,

I recently played through the entire LASO campain on Halo Reach with my friend.
On the map “Tip of the spear” my computer crashed right at the end and my friend finished it without me.

We then continued to finish the rest of the campain missions.

When we were done though, I noticed I couldnt go back and play just the map I was missing.
My friend didnt wanna go through playing the first 5 LASO missions AGAIN, so I grinded and finaly completed the levels.

The thing is, now it says 12/12 on the playlist, and it says I have 1 completed playlist (LASO), but I still didnt get the achivement.
Do I realy have to complete the entire playlist Twice, just to get it?

Regards,
AzUm

2

Try running through the first mission again on LASO. Replaying a mission normally gets the achievement to unlock. That being said, should it not unlock, there is a chance that it will randomly unlock at any given time.

See this thread here. This player was reportedly on a different game entirely.