Do you get anything if you pass the halo 5 campaign on legendary?
No, not even a single REQ armor. 
I didn’t even get my damn achievement.
You get a legendary achievement.
> 2533274875982754;4:
> You get a legendary achievement.
He means a reward.
In Halo 4 we got the Mark-VI MJOLNIR and Legendary Visor.
I think in Reach you unlocked something in the armoury… not too sure.
Bragging rights, I suppose.
Nothing
i didn’t even get my achievement lol, GG 343.