In a couple weeks from now I plan on playing some of the Halo games on Legendary. However, I've heard some bad things about ODST. How hard is it on heroic? How about legendary? I've only ever beat it on normal. Just for comparison, I've beat Reach and 3 on legendary and thought they were moderate, but not too bad. I've also beat 5 on legendary and thought it was easy.
How difficult is 3ODST on Heroic? Legendary?