Halo 3 help

Hey so sorry if I’m doing this forum wrong but I need halo 3 help… trying to get the legendary campaign cleared on the original 360 game but the 6th mission isn’t registering as complete on my achievements or on the level select… I’ve done it multiple times on legendary and the other difficulties, any advice would be a great help

Have a read of this forum, which is what I’m going to base my answer on. Try running the mission from start to finish in one sitting. Don’t save and quit.

Thanks I’ll try it as soon as I can

Yayyyy it worked! Thank you my guy!!!

> 2533274938684874;4:
> Yayyyy it worked! Thank you my guy!!!

It’s alright glad I helped another person and that it worked for you.