Hey Guys
Quick scroll through the forums and and couldn’t see one about this achievement, i may be wrong.
I have completed Halo 4 on co - op with 8 minutes to spare and the achievement hasn’t popped, i have run through two missions solo and completed them on legendary and it still have popped as i saw that was a solution but it didn’t work for me.
Can anyway help me, as this is extremely frustrating
Cheers
Claw