Achievements

I have been doing my first ever legendary walkthrough, and I just finished halo 3, yet I didn’t get the achievements for it. I had been playing coop through the whole game, except the last 2 missions, which I beat on solo. So I thought that would be the reason. Nope, I went back and beat the whole game on coop and it still says I only have 77% unlocked. How do I fix this?

> 2533274939132730;1:
> I have been doing my first ever legendary walkthrough, and I just finished halo 3, yet I didn’t get the achievements for it. I had been playing coop through the whole game, except the last 2 missions, which I beat on solo. So I thought that would be the reason. Nope, I went back and beat the whole game on coop and it still says I only have 77% unlocked. How do I fix this?

According to your stats here on Waypoint, you haven’t done the first two missions in co-op. Doing those again should net you the achievement.

I appreciate the help man! It all worked out